#include <bits/stdc++.h>

using namespace std;

int main() {
  int n1;
  cin >> n1;
  vector<long long> a(n1);
  for_each(begin(a), end(a), [](auto &&e) {
    cin >> e;
  });
  int n2;
  cin >> n2;
  vector<long long> b(n2);
  for_each(begin(b), end(b), [](auto &&e) {
    cin >> e;
  });
  pair<long long, long long> a_rat;
  {
    a_rat.first = a[0];
    a_rat.second = 1;
    for (int i = 1; i < n1; i++) {
      a_rat.second *= a[i];
    }
  }
  pair<long long, long long> b_rat;
  {
    b_rat.first = b.back();
    b_rat.second = 1;
    for (int i = n2 - 2; i >= 0; i--) {
      b_rat = make_pair(
        b_rat.second * b[i],
        b_rat.first
      );
    }
  }
  pair<long long, long long> ans = make_pair(
    a_rat.first * b_rat.second,
    a_rat.second * b_rat.first
  );
  if (ans.first < 0) {
    ans.first *= -1;
    ans.second *= -1;
  }
  auto gcd = __gcd(abs(ans.first), abs(ans.second));
  //cerr << gcd  << endl;
  cout << ans.first / gcd << " " << ans.second / gcd << endl;
}