/* -*- coding: utf-8 -*-
 *
 * 751.cc:  No.751 Frac #2 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 10;

/* typedef */

typedef long long ll;

/* global variables */

int as[MAX_N], bs[MAX_N];

/* subroutines */

ll __gcd(ll m, ll n) {
  if (m < n) swap(m, n);
  while (n > 0) {
    ll r = m % n;
    m = n;
    n = r;
  }
  return m;
}

/* main */

int main() {
  int an;
  scanf("%d", &an);
  for (int i = 0; i < an; i++) scanf("%d", as + i);

  int bn;
  scanf("%d", &bn);
  for (int i = 0; i < bn; i++) scanf("%d", bs + i);

  ll num = (ll)as[0] * bs[bn - 1];
  ll den = 1;
  for (int i = 1; i < an; i++) den *= as[i];
  for (int i = 0; i < bn - 1; i++) den *= bs[i];

  if (den < 0) num *= -1, den *= -1;

  ll g = __gcd(abs(num), den);
  num /= g, den /= g;

  printf("%lld %lld\n", num, den);
  return 0;
}