Teacher: (about Keith) Class, are his calculations correct?
Dustin: (raising his hand) He used the wrong formula.
Keith: What are you talking about?
Dustin: I'll show ya! (walks up to the board) The formula to find the area of a circle, is πr^2, not 2πr. (turns to write out calculations on the board) So, the right answer is 196π.
(Keith glares down at him)
Dustin: Just saying.