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

L = 1
for k in range(1,N1):
    L *= A[k] 
L *= B[0]

U = 1
for k in range(1,N2):
    U *= B[k]
U *= A[0]

def gcd(a,b):
    if b == 0:
        return a
    return gcd(b,a%b)
P = gcd(U,L)

print(U//P,L//P)