#include <bits/stdc++.h>
using namespace std;

int main() {
  int n;
  cin >> n;
  long long up = 1, down = 1;
  cin >> up;
  while (--n) {
    long long a;
    cin >> a;
    down *= a;
  }
  cin >> n;
  for (int i = 0; i < n; i++) {
    long long a;
    cin >> a;
    if (i & 1) {
      up *= a;
    } else {
      down *= a;
    }
  }
  long long g = __gcd(up, down);
  cout << up / g << " " << down / g << endl;
  return 0;
}