#!/usr/bin/env python3
import math
n1 = int(input())
a = list(map(int, input().split()))
n2 = int(input())
b = list(map(int, input().split()))
num = a[0]
den = 1
for a_i in a[1 :]:
    den *= a_i
for i, b_i in enumerate(b):
    if i % 2 == 0:
        den *= b_i
    else:
        num *= b_i
gcd = math.gcd(num, den)
num //= gcd
den //= gcd
if den < 0:
    num *= -1
    den *= -1
print(num, den)