import math
n = int(input())
a = map(int, input().split(' '))
m = int(input())
b = map(int, input().split(' '))
(a[0], b[0]) = (b[0], a[0])
cnt = False
for i in range(n):
    if a[i] < 0:
        a[i] = -a[i]
        cnt = not cnt
for i in range(m):
    if b[i] < 0:
        b[i] = -b[i]
        cnt = not cnt
        
A = 1
B = 1
for i in a:
    A *= i
for i in b:
    B *= i
g = math.gcd(A, B)
if cnt:
    B = -B
print(B//g, A//g)