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

int main() {
  long N, A = 1, B = 1;
  cin >> N;
  for (int i = 0, a; i < N && cin >> a; i++) ((i) ? B : A) *= a;
  cin >> N;
  for (int i = 0, b; cin >> b; i++) ((i) ? A : B) *= b;
  if (B < 0) A = -A, B = -B;
  long g = gcd(A, B);
  cout << A / g << " " << B / g << "\n";
}