Little RALPHY returns from school and says he got an F in arithmetic.

"Why?" asks the father?

"The teacher asked 'How much is 2x3,'"
I said "6", replies RALPHY.

"But that's right!" says his dad.

"Yeah, but then she asked me "How much is 3x2?'"

"What's the f...... difference?" asks the father.

"That's what I said!"