1pub fn add(a: i32, b: i32) i32 {
 2    return a + b;
 3}
 4
 5pub fn subtract(a: i32, b: i32) i32 {
 6    return a - b;
 7}
 8
 9pub fn multiply(a: i32, b: i32) i32 {
10    return a * b;
11}
12
13pub fn divide(a: i32, b: i32) i32 {
14    return @divTrunc(a, b);
15}