import math

input()
*a, = map(int, input().split())
input()
*b, = map(int, input().split())
x = y = 1
for i in a[1:]+b[::2]:
    y *= i
for i in a[:1]+b[1::2]:
    x*= i
if y<0:
    y*=-1;x*=-1
t = math.gcd(x, y)
print(x//t, y//t)