N1 = int(input())
A = list(map(int,input().split()))
N2 = int(input())
B = list(map(int,input().split()))
daut = 1
mot = 1
for i in range(N1):
    if i == 0:
        daut *= A[i]
    else:
        mot *= A[i]
for i in range(N2):
    if i % 2 == 0:
        mot *= B[i]
    else:
        daut *= B[i]
a = 1
if mot * daut < 0:
    a = -1
mot = abs(mot)
daut = abs(daut)

from math import gcd
x = gcd(mot,daut)
print(daut//x * a,mot//x)