#include <bits/stdc++.h>

using namespace std;

using int64 = long long;

int main() {
  int N, M;
  int64 latte = 1, malta = 1;
  int f = 1;
  cin >> N;
  for(int i = 0; i < N; i++) {
    int x;
    cin >> x;
    f *= x;
    if(i == 0) latte *= x;
    else malta *= x;
  }
  cin >> M;
  for(int i = 0; i < M; i++) {
    int x;
    cin >> x;
    f *= x;
    if((M - i) % 2 == 0) malta *= x;
    else latte *= x;
  }
  latte = abs(latte);
  malta = abs(malta);
  auto p = __gcd(latte, malta);
  latte /= p;
  malta /= p;
  if(f < 0) latte *= -1;
  cout << latte << " " << malta << endl;
}