def gcd(a,b):
    if b==0:return a
    return gcd(b,a%b)
N1 = int(input())
A = list(map(int,input().split()))
N2 = int(input())
B = list(map(int,input().split()))
a = A[0]
for i in range(1,N2):
    a = a*B[i]
b = B[0]
for i in range(1,N1):
    b = b*A[i]
d = gcd(a,b)
if a*b>0:
    print(a//d,b//d)
else:
    print(-abs(a//d),abs(b//d))