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] 
for k in range(N2-1):
    L *= B[k]

U = A[0]*B[N2-1]

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