They're already in university, and the primary school system is only just starting out?

The image that loads is a draft paper photographed with a mobile phone.

Only two lines of text were written on the draft paper:

[Question 1: Approximate value of the composite trapezoidal rule: (π/4)*(√2 + 1)≈ 1.8961. Error ≈ 0.1039.]

[Question 2: Approximate value of the composite Simpson's formula: (π/6)*(2√2 + 1)≈ 2.0046. Error ≈ 0.0046.]

Gone.

There was no derivation, no calculation, no formula, nothing at all.

Just two dry lines of results.

Sun Yu's brain went blank for 0.5 seconds.

Before he could react, the seller sent another message.

Seller: [I'm not going to write out the process, so I can lose less money.]

Sun Yu: ?

Is this a question of whether or not I will lose money?

Is this the same math I studied throughout my entire university years?

What's wrong with your problem-solving speed?!

From the moment I posted the question to his reply with the image, the whole process took less than three minutes!

Excluding the time spent typing and uploading photos, did this person calculate it mentally?

No, buddy!

You're actually faster than AI!

Of course, Sun Yu still retained his rationality.

He immediately thought of another possibility: the other party simply didn't know how to do it, made up two random numbers, and gave up.

But after carefully examining the two lines of answers, he began to have doubts.

He had almost forgotten Simpson's formula for the second question, but he still vaguely remembered the complex trapezoidal rule for the first question.

The answer format "(π/4)*(√2 + 1)" seems...it actually makes some sense, at least it looks more professional than just guessing.

"Calm down, calm down..." Sun Yu took a deep breath and forced himself to calm down.

He turned his gaze back to the computer screen.

In the DS dialog box, the cursor continued to blink tirelessly, and the small text below, "Thinking," had been ticking for 150 seconds.

Sun Yu made up his mind and waited for the DS results.

Time passed by, and almost everyone had left the office, leaving only the hum of the air conditioner.

Finally, when the timer reached 224 seconds, the cursor in DS stopped blinking and began to output the answer.

One line, two lines, three lines...

Soon, DS's detailed solution steps filled the entire dialog box.

Sun Yu completely ignored the entire process in between, scrolled the mouse wheel all the way to the end, and stared intently at the final conclusion.

【……In summary:】

【1. Using the compound trapezoidal rule, the approximate value obtained is (π/4)*(√2 + 1)≈ 1.8961, and the absolute error between this value and the accurate value 2 is approximately 0.1039.】

2. Using the compound Simpson's formula, the approximate value is (π/6)*(2√2 + 1)≈ 2.0046, with an absolute error of approximately 0.0046 from the accurate value of 2.

It's exactly the same!

"Oh my god..."

Did I just run into a real pro?!

He couldn't hold back any longer and picked up his phone to send a message.

Sun Yu: [You really didn't do this question beforehand?]

The other party replied almost instantly, and it was two messages in a row.

Seller: [Did you find this question online? Why don't you create another one yourself?]

Seller: [However, you've used up your free quota for two questions. Doing any more will be charged according to the homework tutoring rules.]

Sun Yu: [No need, no need! I believe in your abilities!]

Even a hundred yuan is still money.

Now that our capabilities have been proven, we need to get down to business.

Seller: [Would you like to consult now, or schedule another time?]

Sun Yu remembered his team leader telling him that he needed to check their progress together before leaving work.

He steeled himself and replied: 【Now! Let's begin immediately!】

Sun Yu: [Hey, sir. The engineering plan I have isn't finalized yet, and according to company policy, I can't send you the source files directly. How about we have a remote meeting, and I can project the file to you? Is that okay?]

He was afraid the other party would find it troublesome and refuse.

Unexpectedly, the other party's reply was still straightforward.

Seller: [Yes, but payment is required first, then we can discuss further.]

Sun Yu: "..."

He felt a little speechless.

Even if a genius of this caliber comes from a poor family, they should be receiving so many scholarships and grants from school that they'd be overwhelmed with them, right?

Why are you so obsessed with money?

Despite his complaints, Sun Yu still had to go along with him.

Sun Yu: [Okay. Do you think it can be done in an hour?]

Seller: [Unsure. I haven't seen your proposal, how would I know?]

Undeterred, Sun Yu tried one last time to secure his wallet.

Sun Yu: [What if it exceeds one hour, but not by much, can we just not charge for it? [Pity]]

After the message was sent, the other end fell into a long silence.

A full minute passed, and just when Sun Yu thought the other party had gone offline, a new message popped up.

Seller: [How about this? You just buy the 3-hour package for 2000 yuan. If you don't use up all the time this time, I'll remember it for you, and you can use it next time.]

Before Sun Yu could process those words, the other side delivered another blow.

Seller: [This is the biggest concession I can make. If you can't accept it, then forget it.]

Is this what you call a concession?

Sun Yu looked at the "discounted package price" of 2000 yuan and felt a pang of pain in his heart. That was almost half a month's salary for him.

But then I thought, if I could really get this plan sorted out and satisfy the team leader, I could successfully pass the probation period...

If you're willing to pay to work, then pay to work!

He gritted his teeth and stomped his foot.

Sun Yu: [Deal!]

He immediately returned to the product page, clicked "I want it," and then messaged the seller: "Master, I've placed the order. Could you adjust the price?"

The other party acted quickly, and the price instantly changed from 888 to 2000.

Sun Yu closed his eyes and, with a look of grim determination, pressed the payment button.

As the payment success notification sounded, his heart bled.

After paying, Sun Yu didn't dare to delay and immediately created a new remote meeting using the conferencing software, sending the meeting ID and password to the other party.

A short while later, he saw a new user added to the meeting room member list.

The nickname is two simple English letters: 【CL】.

The other person didn't have a webcam on; only a gray default profile picture was displayed.

A message popped up in the meeting's public chat area.

CL: [Are you a customer?]

Sun Yu quickly opened the PDF file of the plan on his desktop, then clicked on screen sharing and turned on his microphone. He cautiously asked, "Hey? Master? Can you hear me? Is the screen clear?"

After a two-second wait, a youthful but steady male voice came through the earphone.

CL: "It's all very clear."

It definitely sounds like a college student's voice; they're very young.

Sun Yu felt a little more at ease.

"Okay, okay, I'll begin then."

Sun Yu cleared his throat and began pointing to the dense data and formulas on the screen, explaining in detail the background of the entire project, the design concept, and the core verification calculation problem that was currently causing the problem.

He spoke until his mouth was dry and he was completely absorbed.

But on the other end of the headphones, there was only silence.

There were no questions asked, no interruptions, not even the slightest electrical noise.

Several times during the game, Sun Yu couldn't help but wonder if the other side had disconnected or simply fallen asleep.

He had no choice but to bite the bullet and present all the information and data.

"That's roughly the situation," Sun Yu took a sip of water to moisten his dry throat, and tentatively asked, "Master, is there anything you didn't understand?"

As soon as he finished speaking, the young voice rang out almost seamlessly, its tone calm.

CL: "No problem, shall I start working on your new calculation plan?"

Sun Yu: ?

Not a buddy!