the unit digit in the product ( 224 * 607 * 214 * 863 ) is :
"explanation : unit digit in the given product = unit digit in ( 4 * 7 * 4 * 3 ) = 6 answer : c"
subtract(multiply(multiply(multiply(224, 607), 214), 863), subtract(multiply(multiply(multiply(224, 607), 214), 863), add(const_4, const_4)))