2 + 2 + 2 = 7

A teacher ask a student about mathematics :

Teacher :

"Try to listen carefully. If I grant you two rabbits, and two rabbits and two rabbits rabbit again, how many rabbits do you have?"

Student :

"Seven!"

Teacher :

"Let's try another way. If I give you two apples and two apples and two apples again, then how many apples do you have?"

Student :

"Six."

Teacher :

"Good. Now, if I give you two rabbits, and two rabbits and two rabbits again, then how many rabbits do you have?"

Student :

"Seven!"

Teacher :

"How can three times two rabbits equal to seven?"

Student :

"I already had a rabbit back at home."