Pheasant slave, there is a question in "Sun Tzu's Sutra": There are pheasants and rabbits in the same cage today, with thirty-five heads on it and ninety-four feet on it. You do the math using the method I just taught you and see how much time it takes. ”

In the annex of the Chu Palace, Li Kuan, who had nothing to do, was pestered by Li Zhi, a little Zhengtai, to teach arithmetic knowledge.

This seven-year-old child, I don't know what's going on, has been interested in arithmetic since he listened to Li Kuan's professor of Arabic numerals in the Mengxue of the Chu Wangfu.

The education of the princes of the Tang Dynasty actually has a very complete system, such as Li Zhi, who is seven years old this year, has already completed the basic education of Mengxue, and has begun to learn part of the content of the Four Books and Five Classics.

Therefore, the acceptance of arithmetic is also much higher than that of children of the same age.

During this time, due to the need for the construction of the new palace, which involved a lot of statistics, Xu Jingzong borrowed many thirteen or fourteen-year-old students from several schools under the Chu Palace, such as Guanshi Mountain Mengxue.

After using it, you will find that these students who have learned Arabic numerals and accepted the study of "Basic Mathematics" and "Intermediate Mathematics" are better than the bookkeepers in the general shop, and their ability to get started is very strong.

So during this time, there were more arithmetic courses in each school than before.

Li Zhi was also in this situation, and quickly finished learning the arithmetic books in the Chu Wangfu Academy.

After that, Li Kuan was unlucky.

"Second brother, how can the question in this sutra be better solved?"

"Second brother, is it right for the pheasant slave to calculate this topic?"

"Second brother, do you have a better way to solve this problem?"

……

With all this, Li Kuan felt that he was going to be annoyed to death.

Big man, you are the one who wants to be the emperor, what do you do with arithmetic?

However, there is no way, Li Zhi always takes his son with him when he goes out of the palace, and in the face of the two cute babies, Li Kuan has to adjust his mood and guide Li Zhi's arithmetic from time to time.

"Second brother, there are twenty-three chickens and twelve rabbits."

Not long after Li Kuan's words fell, Li Zhi answered this question.

This result surprised Li Kuan.

With the arithmetic level of the Tang Dynasty, it is normal for ordinary scholars to spend half an hour to solve this problem, and it is not surprising that some people can solve it in a day.

As a result, Li Zhi actually solved it in less than a cup of tea.

Odd!

Li Kuan hurriedly picked up a pen and paper and made a quick calculation.

Hey, Li Zhi's answer is actually correct!

"Pheasant slave, have you done this before?"

"No, the masters in the palace don't teach arithmetic, saying that I want to read the book of saints first."

"Then how did you calculate the results in such a short period of time?"

Li Zhi listened to Li Kuan's question, and showed a shy expression on his face, "Second brother, didn't you teach me the unary equation before, and then when I was fine in the palace, I wondered, since there is a one-dimensional equation, is there a binary one-dimensional equation?" Is there a quadratic equation of one element? It just so happens that this question is very close to the binary equation I pondered myself, so I used this method to solve it, right? ”

Li Kuan looked at Li Zhi with a speechless face.

It is said that the gap between people and people is sometimes bigger than the gap between people and dogs.

I didn't believe it before.

Such a seven-year-old kid actually pondered the binary equation there?

Although the people of Datang are relatively precocious, this ripeness is too exaggerated, right?

"That's exactly right, pheasant slave, the second brother didn't expect you to have such a talent for learning."

Li Kuan looked at Li Zhi with a complicated face, this is a mathematician who has been delayed by the throne.

At least a good seedling of a great mathematician.

"Second brother, there really is such a thing as a binary equation, then you can teach me!"

Li Kuan: ......

……

In the Wei River, a large group of ducks swim leisurely in the water, occasionally burrowing into the bottom of the water to see if they can catch a slow fish.

Li Kuan and Cheng Jingwen walked on the cobblestone path near the Wei River in the annex of the Chu Wangfu, leisurely looking at the scenery by the river.

"Lord Wang, the ducks in the Wei River have become a new scene, no matter when you come, you can see ducks of different sizes swimming around in it."

During this time, Li Kuan asked Li Xueyan to find an excuse to ask Cheng Jingwen out, and when she was with Li Kuan, she would no longer blush at every turn.

"This duck meat is edible, duck eggs are also edible, duck down can also be made into warm clothes, this king asked his subordinates to raise more ducks, which can be regarded as providing a new idea for the people of the Tang Dynasty to get rich, and providing a new source of meat for the people of Chang'an City."

Li Kuan unceremoniously raised the behavior of raising ducks in the palace to the height of serving the country and the people, and Cheng Jingwen actually nodded in approval.

"That's true, before that, except for mutton, basically other meat was not very common. This is the case for the noble family, let alone the common people. ”

"The people take food as the sky, and only when the people are fed will Datang be a country that will be passed down for generations, and we can take a leisurely walk here every day."

Although this sentence is a bit false, it is really Li Kuan's true thoughts at this moment.

Therefore, the tone of speech involuntarily brought in some feelings, so that Cheng Jingwen on the side deeply felt Li Kuan's feelings of worrying about the country and the people, and couldn't help but feel ashamed of the prejudice brought to her by various rumors about Li Kuan in Chang'an City before.

"The prince has been busy with the construction of the new palace recently, and there are some various rumors in Chang'an City, in Jingwen's opinion, the prince's contribution to the Tang Dynasty, where can those who only know how to chew their tongues compare."

"The so-called not attracting envy is mediocrity! This king has never been afraid of what people say about me, and His Majesty's imperial front will be full of twists and turns to impeach me from time to time, but as long as I am dedicated to the country, I am not afraid of shadows. ”

Hearing Li Kuan say this, Cheng Jingwen's beautiful eyes couldn't help but flicker, and her admiration for Li Kuan in her heart couldn't help but deepen a little.

Since I was a child, I have known many noble children in Chang'an City, where are those people comparable to the fingers of His Royal Highness the King of Chu?

However, the prince is really, he always asks the snow geese to ask me out to play, can't he let people propose marriage?

makes me scared every time I go out of the house, and it seems that even my mother notices a hint of something unusual.

"Lord Wang, it's not too early, I'm almost going back."

Thinking of this, Cheng Jingwen couldn't help but feel a little depressed.

And Li Kuan, who was on the side, found that Cheng Jingwen's changes were also a little confused.

Looking at the sky, the sun has not set yet, why do you say that you want to go back?

Sure enough, a woman's heart, a needle under the sea!

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