from math import gcd
n_1=int(input())
a=list(map(int,input().split()))
n_2=int(input())
b=list(map(int,input().split()))
x=y=1
for i in a[1:]+b[::2]:
    y*=i
for j in a[:1]+b[1::2]:
    x*=i
if y<0:
    y=-y;x=-x
d=gcd(x,y)
print(x//d,y//d)