6 X 9 = 42

is the 23rd episode of season 3 of The Super Wario Bros. Wah-wah Show!.

Script
Wario: This crossnumber puzzle is driving me nuts! I can't figure anything out! 6 X 9. I KNOW! 42.

Waluigi: It's 54 you moron!

Wario: Whatever!

Wario continues to write the wrong answers and ends up with spaghetti on his paper

Wario: What the heck is this?!

Waluigi explodes