how many figures are required to number the pages the pages of a book containing 365 pages ?
"1 to 9 = 9 * 1 = 9 10 to 99 = 90 * 2 = 180 100 to 365 = 266 * 3 = 798 - - - - - - - - - - - 987 answer : a"
add(add(subtract(divide(divide(365, const_10), const_10), const_1), subtract(subtract(divide(365, const_10), const_1), subtract(divide(divide(365, const_10), const_10), const_1))), multiply(subtract(subtract(365, const_1), subtract(divide(365, const_10), const_1)), const_3))