After the middle-aged man tried to chase for a while, he gave up, the snow was vast outside, people came and went on Suzaku Street, and it was dark early in winter, and it was already twilight at this moment, and it was impossible to find the figure of the two cultivators.

Hey—

The middle-aged man sighed.

I should have opened my mouth earlier to keep the kid.

But what's the use of saying that now, people are gone.

In the first forty years of his life, he had seen countless children with great arithmetic, but it was the first time he had encountered someone with fast mental arithmetic ability like the child just now.

Because of the problem of buying cloth and counting money just now, for an adult, it may take a lot of time, just look at the account room Xiaoer, and often can't calculate it for a while, but an eight- or nine-year-old child can hardly figure it out effortlessly without thinking!

According to his age, he should have just officially entered the academy, right?

And looking at his family background, there shouldn't be any, because the person he called grandpa seems to be worse than him in arithmetic, so who is he?

"Sir, are you back?"

As soon as the middle-aged man walked to the door, he saw that his assistant was already waiting for him at the door.

The assistant's surname is Liang, and his name is Quan.

Although he said that he was his assistant, in the entire Chang'an, there were not many people who could surpass him in arithmetic ability, and he was only in his twenties, and the future was infinite.

He was also his proudest protégé.

"Hmm."

The middle-aged man patted the dust on his body and prepared to enter the house.

"Sir, you just went out to buy fabric, why didn't you see it?"

Liang Quan looked at the doctor who came back with empty hands, and asked strangely, the students of the Arithmetic Hall will also have new uniforms for the new semester, and today the doctor went to the cloth village to buy cloth and then customize the uniforms.

"Oh, I just encountered a little thing in the middle of the teacher, so I delayed buying cloth!"

The middle-aged man slapped his forehead and couldn't help laughing.

"It's okay, it's okay, it's not too late for Mr. to buy it tomorrow."

Liang Quan looked at Mr. and couldn't help laughing.

"Are there any guests here today?"

Before the middle-aged man had even entered the school hall, his nose smelled the smell of strangers in the room.

"Mr. Hui, it's the Third Highness, and Senior Brother Xinghe has come to see you."

Liang Quan's voice was always respectful and meek.

In his eyes, Mr. Li Yan is a great prophet with profound knowledge, after being born in a famous family, he is unique in arithmetic, even if he is the emperor of the dynasty, he will routinely summon Mr. every month to ask about the affairs of the world. And for the sake of the arithmetic career of the Tang Empire, Mr. has never married, and he eats and lives in the school, the purpose of course is for the eternal prosperity of the Tang Empire.

"Your Royal Highness? Walking cranes? ”

Dr. Li Yan was also a little surprised when he heard it.

His Royal Highness would come to the Arithmetic Academy once a month to talk to him about his studies as usual, but Xinghe hadn't come to the Academy for at least a year, right?

In his eyes, Xinghe can be regarded as a child with a unique talent in arithmetic, but he doesn't know why he is unlucky, and he fails every time he participates in the imperial examination, and now he has to find a teaching position in a private school to make a living.

However, seeing that he is still ambitious and his beliefs are not falling, he is also a little comforted.

It's just that I don't know what kind of wind it is tonight, and it actually blew two people?

"Xinghe has seen the doctor!"

Huang Xinghe heard the conversation outside the house, and hurriedly got up and came out to say goodbye to Li Yan.

"Xinghe, you don't have to be so formal!"

Li Yan gently supported Huang Xinghe's elbows, and Huang Xinghe immediately felt a soft force to help his body up.

"Thank you, sir."

Huang Xinghe stood still and looked at the gentleman in front of him, still the same as a year ago.

"Xinghe, why are you here today? Are you still happy to do the things in the school? ”

Li Yan asked Huang Xinghe behind him with concern as he walked inside.

"Mr. Hui, the affairs of the school are quite handy, and Mr. Lao is concerned."

Huang Xinghe followed behind Li Yan and followed closely.

"Well, then why did you come to be a teacher today?"

Huang Xinghe was also an outstanding graduate of the Mathematics Museum, and Li Yan has always had expectations for him, but Huang Xinghe is bent on participating in the imperial examination and does not want to be an arithmetic scholar who specializes in the arts.

In fact, in the Tang Empire, the monarch did not only select talents through the imperial examination, but also law, arithmetic, medicine, martial arts and other specialized disciplines, as long as they have unique talents and contributions in a certain aspect, they can get errands.

But everyone has their own aspirations, and he can't force it.

"Mr. Hui, recently the student got a question, but I am ashamed that the student has been thinking about it for a long time, but he has not been able to calculate the result, so I want to ask Mr. to help see what the solution to this problem is?"

Huang Xinghe directly stated the purpose of this trip, since receiving Yang Jian's provocative question in the morning, he racked his brains and pondered for almost a whole day, but he was still far from the ultimate answer, and in desperation, he remembered Dr. Li Yan, the master of arithmetic in Chang'an City.

But he never thought that he would meet the current Third Highness Li Xiang here.

"Really? Is there anyone else who can stump you today? ”

Li Yan couldn't help but stop when he heard this, and glanced at Huang Xinghe behind him.

"That's true, doctor, just now Xinghe's title Ben Wang also looked at it, indeed, it's difficult."

I don't know when, the Third Highness Li Xiang also appeared in front of Dr. Li Yan.

"When did Your Highness come?"

When Li Yan saw it, he hurriedly rushed to kneel and bow.

"Excuse me, sir!"

Li Xiang saw that Li Yan was about to salute, and took the lead in holding up Li Yan and said with a smile.

"Your Royal Highness has also read the title?"

Li Yan still insisted on saluting Li Xiang, and then got up and asked.

"Dr. Hui, that's true, and besides, this king is also confused."

Li Xiang did read the topic.

But even if he used his fingers and toes, he still couldn't calculate such a huge number.

"What kind of topic, quickly bring it over and show it to the teacher?"

was told by two proud protégés, and Li Yan's curiosity was completely seduced.

Now take off your shoes, fold your knees, sit on a futon that had been prepared earlier, and take a moment to take a good look at what the sacred subject is, how strange it can be?

"Sir, please take a look."

Huang Xinghe respectfully copied Yang Jian's question in the morning on a piece of yellow paper and presented it to Li Yan.

"One plus two, then three, all the way to a thousand, how much do you have to count?"

Li Yan looked at the topic on the yellow paper in front of him, and calculated quickly in his heart, but after a while, his scalp began to tingle.

This topic seems simple, but if you really want to calculate it, it will be calculated.........

Isn't this a deliberate attempt to torture and make things difficult?

Even if you give it for a month, you may not be able to add up to it!

Huang Xinghe and Li Xiang watched the beads of sweat on Li Yan's forehead begin to appear more and more intensively, and they knew that Mr. was also exhausting his brain power at the moment.

"Hey, that's it, that's it, the old man can't do anything-"

After half a cup of tea, Li Yan took the initiative to give up.

"What do you mean, sir?"

Huang Xinghe looked at the pale master, and he was also a little shocked, he wouldn't just stop, didn't he even have a solution?

"Sir, there is nothing you can do?"

Li Xiang was also a little unable to sit still.

Today is really a strange day, in broad daylight, he met a little kid, but he made two wonderful poems in a row that made him and the prime minister's son ashamed, and now, he encountered an arithmetic problem that made the first person in the Tang Empire have a headache and no solution?

"I've done my best for the teacher—"

Li Yan let out a long sigh again, the forced mental arithmetic just now made his brain hurt a lot.

"Is there no solution, sir?"

The assistant who had been on the side couldn't help but be curious, he had also studied the topic just now with Li Xiang and Huang Xinghe before Li Yan entered the door. He always felt that this topic was definitely not a simple Gaga Gaga, and there must be something else in it.

But what the specific mystery is, he is also puzzled.

"Method?"

Li Yan looked at his assistant Liang Quan.

"Hmm."

Liang Quan nodded.

"Please forgive me for being stupid, I really can't see any way."

Speaking of this, Li Yan sighed again.

"Sir, don't be anxious, maybe we think about it again, and there will be a way. It's just, Senior Brother Xinghe, where does this question come from? ”

In the afternoon, I have been thinking about this question with Huang Xinghe and Li Xiang, but I forgot the source of this question.

"Senior Brother Huiliang, I got it from a good friend."

Huang Xinghe was embarrassed to say that the person who wrote this question was an eight or nine-year-old child. In that case, it will be a shame to be thrown to my grandmother's house.

"A friend?"

Li Yan frowned.

"Yes, sir."

Once a lie begins, it takes a thousand lies to fulfill it.

"It seems that this friend of yours has extraordinary arithmetic ability, can you introduce him to the teacher another day?"

Li Yan looked at his disciple and was also fascinated by his friend.

As an advisor to the emperor of the Tang Empire, he must always maintain a modest, cautious, diligent and inquisitive spirit, only in this way can he progress day by day and live up to the emperor's expectations!

"Sir?"

Huang Xinghe panicked in his heart, and the expression on his face was a little chaotic.

"What? Your friends don't want to be a teacher? ”

Li Yan was a little weird.

Isn't your identity enough to meet the other party's dating threshold?

"No, sir, the disciple's friend is a strange person, please let the disciple ask that friend and then report back to the sir!"

Huang Xinghe's heart also began to beat a drum, thinking about how to solve the thorny problem in front of him.

"Well, it's difficult to be a teacher who is not strong, everyone has their own temperament. Understand for the teacher! ”

Li Yan took a deep breath and smiled understandingly.

"Thank you, sir, for your understanding."

Huang Xinghe's hanging heart finally let go.

"Okay, let's put this question here for the teacher first, and then think about it slowly for the teacher."

Li Yan is definitely not a person who admits defeat easily.

He didn't believe that there was anyone in the world who could be more capable of arithmetic than him!