#!/usr/bin/python2
# -*- coding: utf-8 -*-
# †
from operator import mul
from fractions import Fraction as frac

n = int(raw_input())
a = map(int, raw_input().split())
m = int(raw_input())
b = map(int, raw_input().split())
nume = [a[0]] + b[1::2]
deno = a[1:]  + b[0::2]
nume = reduce(mul, nume)
deno = reduce(mul, deno)
res = frac(nume, deno)
print res.numerator, res.denominator