what is the smallest no . that should be added to 31110 to make it exactly divisible by 9 ?
"if a number is divisible by 9 , the sum of its digits must be a multiple of 9 . here , 3 + 1 + 1 + 1 + 0 = 6 , the next multiple of 9 is 9 . 3 must be added to 31110 to make it divisible by 9 b"
add(subtract(9, reminder(31110, 9)), const_2)