if y is the smallest positive integer such that 630 multiplied by y is the square of an integer , then y must be
"630 = 2 * 3 ^ 2 * 5 * 7 to be perfect square , we need to multiply by at least 2 * 5 * 7 = 70 . the answer is d ."
multiply(add(const_2, const_3), const_2)