what is the units digit of 63 ^ 3 * 17 ^ 3 * 49 ^ 3 ?
"the units digit of 63 ^ 3 is the units digit of 3 * 3 * 3 = 27 which is 7 . the units digit of 17 ^ 3 is the units digit of 7 * 7 * 7 = 343 which is 3 . the units digit of 49 ^ 3 is the units digit of 9 * 9 * 9 = 729 which is 9 . the units digit of 7 * 3 * 9 = 189 is 9 . the answer is e ."
divide(add(multiply(factorial(63), factorial(const_4.0)), multiply(factorial(63), factorial(3))), 63)