from fractions import Fraction
from functools import reduce
from operator import mul


def main():
    n1 = int(input())
    a = list(map(int, input().split()))
    n2 = int(input())
    b = list(map(int, input().split()))

    x = Fraction(a[0], reduce(mul, a[1:])) if n1 > 1 else a[0]
    y = Fraction(reduce(mul, b[1::2]), reduce(mul, b[0::2])) if n2 > 1 else b[0]
    ans = Fraction(x * y)
    print(ans.numerator, ans.denominator)


if __name__ == "__main__":
    main()