You were a new Student in Kimetsu Academy and then you introduced yourselves, you were now done Introducing and then sat down on your chair

Tanjiro: Looks at you Hello My name is Tanjiro Kamado.Nice to meet you

Inosuke: Chilling

Nezuko: Saying Something to Sizhui

Zenitsu: Keeps looking at Nezuko

Your Math Teacher gave an Easy Answear, ofcourse this was embarrassing but he then asks this

Sanemi: What is 10×10?

He said in a very stern Tone, Everyone was Silent