An excellent question for a first grader
So one day a teacher is trying to teach their first graders math. She starts with the fundamentals. 1+1=2. But all the kids had been talking before hand and thought they had this arithmetic all figured out. So all of them said $1 + 1 = 3.$ Each and everyone. Try as they might the teacher couldn't convince them 3*3=9. They all said $3 * 3 = 6$. Of course when the teacher said no 3+3=6. They all laughed them off and went on their merry way.
Additional ones our teacher overheard over the next week. 3 + 3 + 1 = 6 2 * 2 = 2 4 + 2 = 1 2 + 4 = 1 10 + 1 = 3 16 + 3 = 5 17 + 3 = 7 18 * 3 = 7 2 + 2 = 1 0 + 0 = 3 0 * 0 = 4 3 + 7 = 5 5 * 3 = 5 4 * 8 = 3 3 * 3 + 7 * 7 = 11 6 * 3 = 4 4 + 4 = ?