from math import gcd

n1 = int(input())
A = list(map(int, input().split()))
numerator = A[0]
denominator = 1
for i in range(1, n1):
    denominator *= A[i]
n2 = int(input())
B = list(map(int, input().split()))
denominator *= B[0]
for i in range(1, n2):
    numerator *= B[i]
gcd_n = gcd(numerator, denominator)
if denominator // gcd_n < 0:
    gcd_n *= -1
print(numerator // gcd_n, denominator // gcd_n)