NASM Assembly mathematical logic

Question

I have a program in assembly for the Linux terminal that\'s supposed to work through a series of mathematical manipulations, compare the final value to 20, and then using if

Answer 1

I think the problem is here:

div    ebx
add    ecx, 1      ;(a+b*c)/(d-e*f) + 1

The result of the div instruction is not in ecx.