The operation rules are the same as those in mathematics. Multiply first, then divide, then add and subtract. If there are brackets, count them first.
For example:
int a=8,b=3,c;
//c is equal to 1 1.
c = a+b;
//c is equal to 5.
c = a-b;
//c is equal to 24.
c = a * b;
//c is equal to 2 (divisible).
c = a/b;
//c equals 2 (remainder)
c = a % b;