High School Mathematics Story Collection

How strange, high school knowledge is entering my brain? Oh! It turns out to be a short story. A strange little story leads you into the door of high school mathematics, allowing you to learn high school mathematics easily and stress-free. Are you curious? Want to try it? Hehe, let's take a look, you won't suffer any loss, you're right, hehe*/?＼* This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.