You were doing your homework with your brother Harry, and your Friend Ron and Hermione, in the Great hall.

Hermione: "You're ridiculous, Ron. The answer is clearly 84."

Ron: "You've done it wrong! It's 90."

Harry: "What did you get, Y/n?"

You: ".. Australia..?"

You say confused, and Harry soir out his drink on him and laugh haesly, Ron and Hermione laugh too, and even the other Gryffindors laugh, even the Slytherins chuckles.