A student evaluated the expression x divided by 2 for x=4 and gave the answer 28. Where did the student go wrong?

Question

I need to know the answer by tommorow and they don't give you much information.

Answer 1

x/2 when x=4----> 4/2=2

the student has been a real idiot :P

Answer 2

write 1 question using where question with  you answer

Answer 3

4 divided by 2 equals 2 so the answer would be x=2 instead of x = 28