Zhao Fu looked up at the new gentleman.

The sunlight shining in from outside the attic door was mostly obscured by the tall figure.

As the crown prince, Zhao Maid and Han Gang, one of the Zaifu, have met many times.

Of course, the most impressive was the night of the winter solstice more than half a year ago.

Like all the ministers, when he came to his father's sickbed, he was very serious, but he was uniquely young. He didn't speak loudly, but for some reason, his grandmother, who had always been scared of Zhao Maid, kept staring at him, and she was furious at the end.

That night, Zhao Maid didn't really understand what was going on at first, but from that day on, fewer people called him Sixth Brother, and they all began to call him the prince. It was also from that day that the people around me began to say, 'Fortunately, there is Han Shumi'.

After the young Han Shumi saluted, Zhao Maid immediately replied respectfully.

The prince is also a king, even if he is Wang Anshi, who is a member of the Pingzhang military state, he must bow first. But Zhao Maid was ordered by the ear to respect the Zaifu and never be rude.

There are special people in the palace to teach etiquette. Zhao Maid did a perfect job in this regard.

However, Wang Yi next to him was not good, and after saluting Han Gang, he stood still.

Zhao Yi turned his face sideways to see what was going on, but Wang Yi quietly pulled his cuffs. Fingers lifted slightly, pointing to a table on one side of the pavilion.

Zhao Jian looked over, and there was a ruler on that table. The one-foot-long wooden ruler was only half an inch small on the edge of the table, and the body of the ruler was almost suspended in the air. And under the ruler, there is also a hammer hanging, connected by a thin rope. The hammer head is made of pig iron, which looks very heavy, so that the wooden handle of the hammer is raised high against the wooden ruler.

'What's going on?' ’

Zhao Mai's round eyes widened. Such a ruler placed on the edge of the table should definitely fall.

Song Yongchen, who came first, had been staring at the edge of the table for a long time.

The hammer, the ruler, and the rope were all brought by him. Tie the hammer to the ruler and place it on the table, all of which follow his little yellow door. Han Gang only moved his mouth, but it was as incredible as a trick.

What the hell is this spell? Song Yongchen wanted to ask but didn't dare to ask. Like him, the chamberlain in the pavilion, as well as the maid Zhao and Wang Yi who had just come in, as well as the chamberlain, the palace maid and the nurse who followed them, a large number of people looked at it with an incredible face. But after a few glances, they straightened up, glancing only with the corners of their eyes, and exchanged their eyes with themselves.

'It's definitely glue. ’

'Fake hammer. ’

"It's Han Shumi. ’

Han Gang Zhilu said, there will definitely be people who can't figure it out. Even in later generations, how many smart people who have studied physics and graduated from junior high school are determined that it is impossible. In this day and age, how many people can think clearly?

That's what he's about, to take the lead.

Han Gang coughed once, twice, pulling everyone's attention over. He is a teacher and cannot allow his students to fall into confusion. Moreover, he is going to class too.

Han Gang had seen the exercises that Zhao Maid had done before, and in fact, the calculations and records were based on the cursive numbers that are commonly used in the world today.

The straw code was originally used by merchants, and it was drawn directly on the boxes or sacks of the goods carried, and the number of goods in the box could be known by looking at the label on the outside. Sometimes, simple ledger records are also written in scratch.

However, the draft code that is now in use in the world has been improved. The old one-two-three is a simple ninety-degree twist of the text one-two-three to erect it, while the improved one-two-three can not be tampered with by adding strokes. Improvements made in combination with a portion of Arabic numerals. So that someone tampered with the numbers, and it was easy to see the flaws. This is because Han Gang is dominant, so in many elementary schools in Kansai, this cheap and easy-to-use arithmetic book is used.

Of course, in a real account book, it cannot be a simple sketch, and there must also be numbers in capital letters.

Whether it is the civil or the imperial court, the numbers in the account books are capitalized as the confirmation standard, and even the cursive and lowercase one, two, three, only one two three are used. This is a habit that has been passed down since the Tang Dynasty, and now it has spread to all parts of the country. Especially the government - 'all the documents of the government today are counted, and they are all taken from the same sound and those who draw more are reused.' So one, two, three, wanton and the like, are not counted, but take the word of the same voice, borrow it for use, and the precious dot painting can not be changed to the adulterous ear'.

"Multiplication and division, Your Highness and Tuanlian should have learned it." Han Gang asked the two distinguished students.

"Ninety-nine songs, I can memorize them. The maid brother got it earlier than the student union. Wang Yi said proudly.

Song Yongchen also added: "The prince is naturally smart, and now there is no problem with addition, subtraction, multiplication and division within a hundred." ”

Han Gang had long heard that Zhao Maid was precocious, and he was calm and calm at a young age. He knew about it for a long time, but he was still surprised to see it with his own eyes.

It's actually nothing to memorize the ninety-nine multiplication table, and Wang Yi, who hasn't finished a volume with only addition and subtraction for most of the part, can actually memorize it, but he won't be flexible at all. The eldest and second eldest of the Han family were also forced by Wang Yi to memorize when they were four or five years old, but it took two years to practice in use.

But Zhao Maid can now add, subtract, multiply and divide within 100!

Six-year-old, Han Gang secretly sighed.

A talent that a normal child can only have until he is at least nine years old, and Zhao Warriors have it now.

It's about the same as a child who is good at math at about nine years old. Zhao Warriors can also be regarded as geniuses, but they are far from those monsters in the history of mathematics, such as Gauss and the like. is not as good as Shen Kuo, who claims to be able to understand the "Island Sutra" at the age of eight. But a year later, the four arithmetic will definitely be fine.

"That's good, let's do these questions first, and see which one I've learned."

Han Gang took out an exam paper for the first time, and turned all the difficult points that are easy to encounter in mathematics into the content of the exam. As long as you study math for a while, you should be able to answer it.

After a cup of tea, Zhao Maid finished it first, while Wang Yi was sweating profusely and looked at the volume, but he was only halfway written.

Sure enough, he is very smart. Han Gang said in his heart.

However, although Zhao Maid is smart, her physique is much thinner than that of ordinary children, and her face is pale. Wang Yi, who was in the same year, was also half a head shorter. In comparison, Han Gang's sons and daughters have rosy and shiny cheeks, and after the summer, because of learning to ride and shoot, the eldest and second are even tanned. The difference in physique is too great.

Zhao Maid has been sick since he was born, and Han Gang has not been in Beijing for more than half a year, but fortunately there is no major problem. Otherwise, the queen can exile the person who proposed Han Gang's departure from Beijing.

And really good luck.

Han Gang took the paper and scanned it at a glance, and found that almost all of them were right, and only two questions were wrong.

It's a rare thing to think about.

Judging from the volume, Zhao Maid is at least the level of the third grade of primary school in later generations. After learning the textbook compiled by Han Gang for Mengxue, it is almost at this level. But Zhao is only six years old. That's smart.

After finishing the question, Zhao Yan was bored and waited for Han Gang's fate. Seeing that Wang Yi still had a long way to write, Han Gang said to Zhao Maid: "If Your Highness is free, you can do another question." ”

Zhao nodded and said 'yes'.

"The question is very simple, one plus two, then three, then four, and so on until you get to a hundred. That is, from one to one hundred, what is the sum of these hundred numbers. ”

Zhao immediately picked up the pen and calculated it on paper.

After another quarter of an hour, Wang Yi finally wrote almost, but Zhao Maid hadn't done it yet, and it still looked a little worse.

"Take a break." Han Gang motioned to Zhao Maid to stop writing and stop counting, he actually chose the most troublesome death calculation. It can be said that after all, it is still a step behind, not as good as those real mathematicians.

"Let's talk about an old thing. It has to do with elephant play, and it has to do with counting. ”

Wang Yi immediately dropped his pen and pricked up his ears to listen to the story. And Zhao Maid is still sitting upright, just blinking his eyes, still very interested.

"I don't know Your Highness, the group practice can know the elephant opera?"

Zhao Yi and Wang Yi nodded vigorously.

Nowadays, there are many types of elephant operas in the world, such as elephant operas, baby elephant operas, and elephant operas of the Seven Kingdoms. But the most popular is the Chu and Han Elephant Opera created by Han Gang, the rules are simple, the layout is also simple, and Han Gang's fame is also great, so it quickly became popular. There are also many people in the palace who will go down. Zhao Fu and Wang Yi have at least seen people play chess.

"Back then, the minister made a bet with the Privy Council's Zhangdian, if the minister lost, he would lose a hundred dollars, and if he lost, then he only needed to lose the wheat."

"Hundred wheat?"

"It looks like a lot."

Zhao Maid and Wang Yi exchanged ears, and Song Yongchen also calculated the amount of wheat in his heart, but Han Gang's next words were really unexpected:

"It's by the grain. The first grid contains one grain of wheat, the second one two grains, the third one four grains, and the fourth eight grains. Just double the number of squares and fill all sixty-four squares. ”

'So little? The same thought flashed through everyone's mind.

"And then?"

Then he said that he would never bet unless the bet was exchanged. That is, I give wheat, and he pays for the bet. But that's the minister's turn. Han Gang smiled, "Later, the minister used the same conditions to plan to play chess with Shen Kuo, who had been the third envoy. But as soon as he heard this, he stopped doing it, saying that he couldn't gamble if he went bankrupt. ”

"Sir, it's just a few grains of wheat." Wang Yi couldn't help but speak.

Han Gang's face became serious, "To do knowledge, you pay attention to honesty. Be honest. The worst thing is to just say good and bad out of thin air. Is it really just a few grains of wheat? How much is it, or will we talk about it later! ”

Han Gang was smiling before, and he looked kind. Although before class, I was told to be honest. But Han Gang didn't put on the shelf of the division commander, and Wang Yi's courage increased. But now that Han Gang's face was a little pale, he was immediately honest.

The first time he took an arithmetic class, Han Gang just asked him to make a volume, told a story, and then pointed out the mistakes of the paper and explained them one by one. However, the two students have a thorough understanding, mainly in mathematics, Wang Yi is a little worse than Zhao Maid, and Zhao Maid will become even better in a few years - after all, people are smart.

At the end of an hour's lesson, Zhao Maid and Wang Yi saluted Han Gang together to express their gratitude.

After Han Gang returned the salute, he pointed to the ruler and hammer that were still stable on the edge of the table, "Then you don't want to know the reason for the Dao?" ”

"Please give me advice." Wang Yi hurriedly said. Everyone in the cabinet was in good spirits, and they had been wondering for an hour.

"That's the after-class exercise." Han Gang didn't give a direct answer with a kind eye, "There are three today, one is 'how much is from one to one hundred'." One is 'Because Zhang and Shen are both unwilling to bet, how many grains of wheat should be put on the chessboard'? The last one is, 'What kind of ruler won't fall off?'" Next time you have a class, have your answers ready. ”

Zhao Fu and Wang Yi were stunned and went back, Song Yongchen immediately filled in, and he asked Han Gang: "Han Shumi, is this really not a trick?" ”

Han Gang's face suddenly became gloomy. Song Yongchen was excited, and immediately reacted, what Han Gang hated the most was strange power and chaos.

"But the prince is only six years old, and he definitely doesn't know what to do."

"What's so hard. Can't you ask people if you can't figure it out? It's enough to write the answer yourself."

Song Yongchen was taken aback: "Can you ask someone?" ”

"Who knows everything. If there is something you don't understand, of course, you have to ask someone. The most feared thing is self-righteousness. ”

It is not necessary to be an expert in everything, but to learn to find an expert to consult is what the superior should do. As for how to choose, who to trust, that's the key.

I believe that Song Yongchen will understand, and the two people behind him will also understand. The three questions are even more out for them.

What Han Gang wants to teach is not only knowledge, but more importantly, how to learn. How to do things, how to think.

His goal is to shape Zhao Fu with a scientific outlook on life, the world, values and methodology.

To do things, learn to be a person first. Righteous heart, first correct three views.

This is Han Gang's idea.