#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  long long nume = 1, denm = 1;
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    if (i == 0) nume *= x;
    else denm *= x;
  }
  cin >> n;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    if (i % 2 == 1) nume *= x;
    else denm *= x;
  }
  long long g = __gcd(1LL * abs(nume), 1LL * abs(denm));
  if (nume < 0 && denm < 0) {
    nume *= -1;
    denm *= -1;
  }
  if (denm == -1) {
    denm *= -1;
    nume *= -1;
  }
  cout << nume / g << " " << denm / g << endl;

  return 0;	
}