from math import gcd
n1 = int(input())
a = list(map(int, input().split()))
n2 = int(input())
b = list(map(int, input().split()))
bumbo = 1
bunsi = a[0]
for i in range(1, n1):
    bumbo *= a[i]
for i in range(n2):
    if i % 2 == 0:
        bumbo *= b[i]
    else:
        bunsi *= b[i]
if bumbo < 0:
    bumbo *= -1
    bunsi *= -1
g = gcd(bumbo, bunsi)
print(bunsi // g, bumbo // g)