She read the note and sighed.
"Really Johnny. Swearing in class. Your father will have to deal with this."
Later on Little Johnny is with his father.
"What this I hear about you swearing in school?" he growled.
"Well I'll tell you what happened," Little Johnny said. "I was asked what nine plus seven was and I said sixteen."
"That's right," said his father.
"Then I was asked what seven and nine equals."
"What's the

"That's just what I said," replied Little Johnny.