#! /usr/bin/env python3
import math

input()
*a, = map(int, input().split())
input()
*b, = map(int, input().split())
x = y = 1
for i in a[1:]+b[::2] : y *= i
for i in a[:1]+b[1::2] : x *= i
if y < 0 : y*=-1;x*=-1
t = math.gcd(x, y)
print(x//t, y//t)