import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

from functools import reduce
from operator import mul
from fractions import Fraction

NA = int(readline())
A = tuple(map(int,readline().split()))
NB = int(readline())
B = tuple(map(int,readline().split()))

num = []
den = []
num.append(A[0])
den += A[1:]
num += B[1::2]
den += B[::2]

n = reduce(mul, num, 1)
d = reduce(mul, den, 1)
answer = Fraction(n,d)

print(answer.numerator, answer.denominator)