how many 2 digit number contain number 3 ?
"total 2 digit no . = 9 * 10 * = 90 not containing 3 = 8 * 9 = 72 total 2 digit number contain 3 = 90 - 72 = 18 answer : a"
add(subtract(subtract(const_1000, const_10), multiply(multiply(const_10, multiply(2, 2)), multiply(const_4, const_2))), const_10)