from fractions import Fraction

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

numer = A[0]
denom = B[0]

for i in range(1, N1):
    denom *= A[i]

for i in range(1, N2):
    if i % 2 == 0:
        denom *= B[i]
    else:
        numer *= B[i]

f = Fraction(numer, denom)

print(f.numerator, f.denominator)