from fractions import Fraction

n1 = int(input())
A = list(map(int, input().split()))
n2 = int(input())
B = list(map(int, input().split()))

a = Fraction(A[0], 1)
b = Fraction(B[n2 - 1], 1)

if n1 > 1:
    a = Fraction(A[0], A[1])
    for i in range(2, n1):
        a = a * Fraction(1, A[i])
if n2 > 1:
    b = Fraction(B[n2 - 2], B[n2 - 1])
    for i in range(n2 - 3, -1, -1):
        b = B[i] / b

c = a / b
print(c.numerator, c.denominator)