"Yes......." Wu Ji, who was sweating profusely, finally said in frustration. Today's purpose can't be achieved, how did this person calculate it so quickly! His heart was full of shock, in his opinion, this question is difficult and extremely cumbersome, it is impossible for anyone to calculate it quickly, Cai Yong is very haode proof.

"Hehehe...... Brother Bo really deserves to be a scholar in the world who looks up to his predecessors, and everyone in the house has such knowledge, and if it is passed on, those younger generations must be ashamed of themselves." Zhang Yunda smiled with a sigh of relief.

Wu Ji's face flushed with shame when he heard this, and he hurriedly said: "Qin Zijin, how did you calculate it, you, you can calculate it without even deducing?" ”

"Hmph, this is a mental arithmetic, passed down by my master, how can I tell you." Qin Feng said with a smile.

Cai Yong was a little embarrassed when he heard this, and he also knew that Qin Feng was helping him speak. Literati cherish feathers, and when he saw Qin Feng defending himself, he was grateful in his heart.

"It's ......." Wu Ji no longer had the calmness he had before, and he stood in the middle of it. "Lord Cai is famous all over the world, and the people in the family are so good, I am leaving!" Wu Ji said two words and wanted to slip away.

"Wait, don't be rude, I also have a question here, and I'm about to give advice." Qin Feng stopped him.

Wu Ji's expression was a little messy, he was also conceited and talented, and he was unwilling, thinking that if he could answer, it would also be a city back, and spreading it would be good for his reputation, so he settled down and said, "Please give ......me advice." ”

Cai Yong didn't move when he heard this, so he waited for Qin Feng to come up with the question, wanting to see if he was really talented. Lu Zhi and others don't need to go into details, and the same is true. Because Cai Yong was definitely not pretentious just now, this Qin Feng was able to answer immediately, thinking that he must be a talented person, so he wanted to hear what questions he would have.

Qin Feng didn't expect that on the first day of coming to Caifu, he encountered the opportunity to show in front of the cows, smiled slightly in confidence, and said: "I'll tell you a simple one, Luoyang City is assumed to have 100,000 households, a household is assumed to have five people, one person has one liter of rice a day, how many liters of rice will these 100,000 households consume in three days?" ”

"Ahh This....... Wu Ji was immediately dumbfounded, he had some calculating eyebrows, but there was no guy on hand, how could this be calculated?

Cai Yong stroked his long hair with his hand and smiled and ordered, "Go, give him the pen and paper." ”

Wu Ji was frightened at the moment, this question was easy to hear at first, but it was no longer under the question he just made. I calculated the question just now, and it took me two days to ....... Helpless, he picked up the pen and began to calculate on the paper.

If you can't be killed by ravage, Qin Feng reprimanded sharply: "Go down and count slowly, don't pollute the eyes of your lords here." "With such a simple multiplication problem, Qin Feng can only ...... the calculation level of the ancients.

Wu Ji was ashamed, and his fart and urine flowed down.

Cai Yong's eyes sparkled and looked at Qin Feng, his heart was furious, and he hurriedly said, "Retire below." ”

Cai Yong likes mathematics, seeing that he has thaumaturgy, how can he let him leave easily. "Wait, Qin Feng, do you have an answer to the question you just asked?"

Lu Zhi and the others were also waiting for Qin Feng to answer.

"For 100,000 households, five people in a household are 500,000 people, and one liter of rice per day is 500,000 liters, and one and a half million liters in three days. It's much simpler than the question just now. Qin Feng said with a smile.

It's so much easier! Cai Yong and the others looked at each other, and in their opinion, the two questions were of the same level, and the number was huge and difficult to calculate.

"You, how did you figure it out so quickly!" Cai Yong couldn't help but stand up and exclaimed.

Made, it's been a thousand years ago, and if you let go of this great opportunity to show your face, it will be in vain. Qin Feng thought about how this name could be spread, it would also be beneficial for him to get ahead in the future. came to Cai Yong's mansion on an errand because he was a master of the academic world, and he came here because he had a lot of opportunities, of course, Cai Wenji was also one of the important reasons. So he walked over boldly, picked up the pen and paper on the table, and wrote it down with a brush.

Ma Riyan and the others walked over, and they saw a character they didn't recognize.

"What is this?" Lu Zhi couldn't help asking.

Qin Feng saw these cattle staring at them and smiled: "Arabic numerals." When he was in school, his math teacher once said that Arabic numerals appeared around 500 A.D., not to mention that these Han Dynasty people did not understand, and now Arabs probably do not understand them.

"Arabic numerals!" Cai Yong and the others stared at each other in amazement.

Qin Feng couldn't help but be secretly happy when he saw these cattle people in a daze, this is also something that can't be helped, who let him understand it alone on the current earth! Seeing the surprised appearance of these people, he doubled his confidence, he had knowledge that was nearly two thousand years ahead, and it was difficult to think of it.

"Arabic numerals?" Cai Yong shook his white beard and asked puzzled.

Qin Feng thought about it, and then annotated the measurement characters of Chinese characters on each number. After that, the multiplication formula table was listed, one by one to get one, two two to get four ......, ninety-nine eighty-one.

Cai Yong and the others looked at Qin Feng like monsters, and they had already vaguely understood some of these ingenious connections.

"Brother Bo, if this mantra is passed on, the arithmetic will change ......!" Zhang Tao thought of the beauty and exclaimed.

"Zijin, is this your original?" Ma Riyan hurriedly asked.

"Occasionally, I think about it, I get it, I learn it." Qin Feng said with a smile.

At this time, in the Han Dynasty, learned people had realized the importance of arithmetic, and arithmetic was already a discipline, so people like Cai Yong would dabble in it. They thus understood that this thing called Arabic numerals was easy to understand and easy to write, and the importance of this mantra table to arithmetic was self-evident.

Innovation and change of a school of thought are actually what mortals can do. In their opinion, Qin Feng's talent is undoubted, and he is also a great talent!

Lu Zhi's eyes flashed, and his arithmetic went up to arranging troops to calculating grain, grass and ordnance, all of which were indispensable talents in the army. As far as he knew, those in the army had to work a day to calculate how much food a battalion of sergeants would consume in a month. Such a talented person nesting in Cai Yong's mansion is really tyrannical. "Brother Bo, do you want to cut your love, let me bring Zijin back to my house."

Let this old fox take the lead, Yang Biao and the three of them couldn't help but think. The minds of these big family officials are flexible, and recruiting talented people for the family is the first element of the family's prosperity.

What a situation! Old guy Lu Zhi wants to take me! That's unacceptable! Qin Feng knew in his heart that if he followed Lu Zhi, then when it came to the Yellow Turban Rebellion, he would definitely have a better future than Cai Yong.

Because Lu Zhi was a military attaché, although he was framed for a crime of disadvantage in battle, he was escorted back to the capital. But then he was immediately released from prison and still became a high-ranking official like Shangshu. If you help him survive the prison disaster during the Yellow Turban and make some military exploits, he will definitely be able to mix up a big official.

However, Qin Feng thought again, if he came like this, he would have to pass by Cai Yan, then she was a famous talented woman in the Three Kingdoms, and she was close at hand! Besides, this is a change of time, and the name is not good. In the Cai family, Cai Yong will be the old man in the future, and there will be nothing.

Cai Yong saw that Lu Zhiming was coming to dig the corner of the wall, and frowned slightly. Because of his bad face, he refused openly, and looked at Qin Feng anxiously.

Qin Feng was furious by the bulls, and hurriedly made a stand, saying, "Thank you General Lu for your kindness, I am already here, and I will not leave easily." He was thinking in his heart, why did he have to go to the inner house and meet Sister Cai Yan. The talented women of the Three Kingdoms are worthy of admiration, if they are beautiful and delicious, then they ......, hehe.......

Cai Yong didn't know what Qin Feng was planning behind his back, if he knew, he would definitely beat him out. Hearing this, he was overjoyed and said, "It seems that Brother Zigan is going to be disappointed." ”

Seeing Qin Feng's refusal, Lu Zhi sighed, and the matter was stopped. They are different from snobbish officials, and they love talents, so they also let Qin Feng join in the banquet.

Qin Feng explained the multiplication formula table in detail, and Cai Yong and the others were amazed when they heard the wonders of the explanation, and they loved his arithmetic talent even more.

Jiang Chuan and the others, seeing that this Qin Feng had become the central figure of the banquet, were already dumbfounded, and envy, jealousy and hatred were inevitable. Xiaohong, these maidservants, saw him talking eloquently, and admired him very much.

After Yang Biao, Lu Zhi, and Ma Riyan left, there was a trace of Qin Feng in the chat of the Luoyang City family.

……

"Zijin, I didn't expect you to have such a talent in mathematics." After the dinner, Cai Yong couldn't put it down with the multiplication formula in his hand, and took Qin Feng to his study.

"Mr. has won the prize." Qin Feng said. He wasn't used to calling others master, so he used such a title.

Cai Yong didn't care, talented people should be used in the right place, Lu Zhi and others could think of it, he could think of it too, so he smiled and said: "Cai Lin, is there a vacancy in the account room?" ”

"Back to the master, Steward Zhang left after illness, and there is a lack of a steward." Cai Lin said.

"Oh, that's a coincidence. Zijin has made great achievements in mathematics, so he will manage the accounts of the house in the future. Cai Yong said.

"Yes, sir." Cai Lin couldn't help but be shocked, she was really not mistaken, this Qin Zijin was really not a mortal. Others have been on errands for more than ten years, and they have not been promoted, but he has only been here for a day and has become a first-class manager, and he will be scared to death if he says it.

"You're going down." Cai Yong said.

First-class steward, in this way, I can go to the inner house openly! Qin Feng hugged his fist at Cai Lin's appearance, "Retire." And he went outside.

"Father, I heard that you have a set of numeracy techniques!"

Just as Qin Feng was about to walk to the door, a voice like a yellow warbler came in from outside.

What a beautiful voice, but I want to see who is the owner of this voice? Listening to the call for Cai Yong to be his father, could it be that Cai Yan, a talented woman, has arrived! Qin Feng immediately slowed down a bit, so that he could take a look at the person who came.