n1 = int(input())
A = [int(a) for a in input().split()]
n2 = int(input())
B = [int(b) for b in input().split()]

for i in range(1, n1-1):
    A[i+1] *= A[i]
for i in range(n2-1, 1, -1):
    B[i-2] *= B[i]

if n1 == 1:
    A.append(1)
if n2 == 1:
    B.append(1)
x = A[0]*B[1]
y = A[-1]*B[0]
sgn = 1
if x*y < 0:
    sgn = -1
x = abs(x)
y = abs(y)

def gcd(a, b):
    if b > a:
        a, b = b, a
    if a%b == 0:
        return b
    return gcd(b, a%b)

print(sgn*x//gcd(x, y), y//gcd(x, y))