the unit digit in the product ( 594 * 897 * 929 * 462 ) is :
"explanation : unit digit in the given product = unit digit in ( 4 * 7 * 9 * 2 ) = 4 answer : d"
subtract(multiply(multiply(multiply(594, 897), 929), 462), subtract(multiply(multiply(multiply(594, 897), 929), 462), add(const_4, const_4)))