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

int main(){
  int n1, n2;
  int a;
  pair<long long, long long> bun1, bun2 , ans;

  cin >> n1 >> a;

  bun1.first = a;
  bun1.second = 1;

  for(int i = 1;i < n1;i++){
    cin >> a;
    bun1.second *= a;
    int tmp = __gcd(bun1.first, bun1.second);
    bun1.first /= tmp;
    bun1.second /= tmp;
  }

  cin >> n2 >> a;

  bun2.first = a;
  bun2.second = 1;

  for(int i = 1;i < n2;i++){
    cin >> a;
    bun2.second *= a;
    int tmp = __gcd(bun2.first, bun2.second);
    bun2.first /= tmp;
    bun2.second /= tmp;
  }

  ans.first = bun1.first * bun2.second;
  ans.second = bun1.second * bun2.first;

  int tmp = __gcd(ans.first, ans.second);

  cout << ans.first/tmp << " " << ans.second/tmp << endl;

  return 0;
}