the unit digit in the product 7858 * 1086 * 4582 * 9783 is ?
"unit digit in the given product = unit digit in 8 * 6 * 2 * 3 = 8 answer is c"
subtract(multiply(multiply(multiply(7858, 1086), 4582), 9783), subtract(multiply(multiply(multiply(7858, 1086), 4582), 9783), add(const_4, const_4)))