how many numbers from 10 to 10000 are exactly divisible by 9 ?
"10 / 9 = 1 and 10000 / 9 = 1111 = = > 1111 - 1 = 1110 . therefore 1110 answer : c"
add(divide(subtract(multiply(floor(divide(10000, 9)), 9), multiply(add(floor(divide(10, 9)), const_1), 9)), 9), const_1)