the unit digit in the product 784 * 618 * 917 * 463 is ?
"unit digit in the given product = unit digit in 4 * 8 * 7 * 3 = 2 answer is b"
subtract(multiply(multiply(multiply(784, 618), 917), 463), subtract(multiply(multiply(multiply(784, 618), 917), 463), add(const_4, const_4)))