GCD not working

larger = input("larger: ")
larger = int(larger)
smaller = input("smaller: ")
smaller = int(smaller)
remainder = 0
def recursive_foo(small, large, remain):
    remain = large%small
    if remain != 0:
        large = small
        small = remain
        recursive_foo(small, large, remain)
    if remain == 0:
        return small

smaller = recursive_foo(smaller, larger, remainder)
smaller = str(smaller)
print("the gcd is " + smaller)