Little Johnny does Math

[rebbonk]

Little Johnny 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.'"
"But that's right!"
"Then she asked me 'How much is 3x2?'"
"What's the difference?"

Spoiler:

"That's what I said!"