from math import gcd

n1 = int(input())
alst = list(map(int, input().split()))
n2 = int(input())
blst = list(map(int, input().split()))

u = alst[0]
d = blst[0]
for num in alst[1:]:
    d *= num
for i, num in enumerate(blst[1:]):
    if i % 2 == 0:
        u *= num
    else:
        d *= num


if d * u < 0:
    d = abs(d)
    u = -1 * abs(u)
else:
    d = abs(d)
    u = abs(u)
tmp = gcd(d, u)
print(u // tmp, d // tmp)