import math
N1 = int(input())
A = list(map(int, input().split()))
N2 = int(input())
B = list(map(int, input().split()))

sign = 1
for a in A:
    if a < 0:
        sign *= -1

for b in B:
    if b < 0:
        sign *= -1

bunshi, bumbo = abs(A[0]), 1

# A
for i in range(1, N1):
    bumbo *= abs(A[i])

# B
for i in range(N2):
    if i%2 == 0:
        bumbo *= abs(B[i])
    else:
        bunshi *= abs(B[i])

g = math.gcd(bumbo, bunshi)
bumbo //= g
bunshi //= g

bunshi *= sign
print(bunshi, bumbo)