from fractions import Fraction as F
N = input()
A = map(int, raw_input().split())
M = input()
B = map(int, raw_input().split())
B.reverse()
X = A[0]
for i in xrange(1, N):
    X /= F(A[i])
Y = B[0]
for i in xrange(1, M):
    Y = F(B[i]) / Y
Z = X / Y
print Z.numerator, Z.denominator