n = int(input())
*a, = map(int,input().split())
m = int(input())
*b, = map(int,input().split())

p = a[0]
q = 1
for i in a[1:]:
    q *= i
for i in b[m-1::-2]:
    p *= i
for i in b[m-2::-2]:
    q *= i
from math import gcd
g = gcd(p,q)
p //= g; q //= g
if q < 0: p,q = -p,-q
print(p,q)