import fractions
import functools


def main():
    _ = input()
    xs = [fractions.Fraction(int(x), 1) for x in input().split()]
    f = functools.reduce(lambda f1, f2: f1 / f2, xs)
    # print(f)
    _ = input()
    ys = [fractions.Fraction(int(x), 1) for x in input().split()][::-1]
    g = 1 / functools.reduce(lambda f1, f2: f1 / f2, ys)
    # print(g)
    res = f / g
    if res.denominator >= 0:
        print(res.numerator, res.denominator)
    else:
        print(-res.numerator, -res.denominator)


if __name__ == '__main__':
    main()