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

x = a[0]
y = b[0]

def gcd(a,b):
	a, b = abs(a), abs(b)
	if a < b:
		a, b = b, a
	while b >= 1:
		a, b = b, a % b
	return a

for i in range(n2-1):
	if i % 2 == 0:
		x *= b[i+1]
	else:
		y *= b[i+1]
for i in range(n1-1):
	y *= a[i+1]

if y < 0:
	x, y = -x, -y

x, y = x // gcd(x,y), y // gcd(x,y)


print(x, y)