how many 5 digit number contain number 3 ?
"total 5 digit no . = 9 * 10 * 10 * 10 * 10 = 90000 not containing 3 = 8 * 9 * 9 * 9 * 9 = 52488 total 5 digit number contain 3 = 90000 - 52488 = 37512 answer : e"
add(subtract(subtract(const_1000, const_10), multiply(multiply(const_10, multiply(5, 5)), multiply(const_4, const_2))), const_10)