n1 = int(input())
A = list(map(int, input().split()))
n2 = int(input())
B = list(map(int, input().split()))

x = A[0]
y = 1

for i in range(1, n1):
    y *= A[i]

for i in range(n2):
    if i%2 == 0:
        y *= B[i]
    else:
        x *= B[i]

import math
if x*y > 0:
    g = math.gcd(x, y)
    a, b = abs(x)//g, abs(y)//g
else:
    g = math.gcd(abs(x), abs(y))
    a, b = -abs(x)//g, abs(y)//g
print(a, b)