what least number must be added to 1056 , so that the sum is completely divisible by 23 ?
"23 ) 1056 ( 45 92 - - - 136 115 - - - 21 - - - required number = ( 23 - 21 ) = 2 . a )"
subtract(multiply(add(multiply(const_4, const_10), const_2), 23), 1056)