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

for i in range(1, n2):
    A[0] *= B[i]

for i in range(1, n1):
    B[0] *= A[i]

import math
if A[0]*B[0] > 0:
    g = math.gcd(A[0], B[0])
    a, b = A[0]//g, B[0]//g
else:
    g = math.gcd(abs(A[0]), abs(B[0]))
    a, b = -abs(A[0])//g, abs(B[0])//g
print(a, b)