C114 Doubt will be Dealt with

"Don't worry, I know what I'm doing."

"Alright, let's leave it at this for now. I'm hanging up."

"Yes."

After hanging up, the math teacher looked at the direction Liu Lang and the others were heading to, and let out a long sigh, "Tsk tsk, I shouldn't be mistaken. This kid is definitely a real genius in math