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

#define int long long
#define rep(i,l,r) for(int i=(int)(l);i<(int)(r);i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
template<class T>bool chmax(T &a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T &a,T b){if(a>b){a=b;return 1;}return 0;}

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
}*/

int gcd(int a, int b)
{
  if(a < b) swap(a, b);
  if(b == 0) return a;
  return gcd(b, a%b);
}

signed main()
{
  int na;
  cin >> na;
  vi a(na);
  rep(i, 0, na) cin >> a[i];

  int nb;
  cin >> nb;
  vi b(nb);
  rep(i, 0, nb) cin >> b[i];
  
  int n = a[0], m = b[0];
  rep(i, 1, na) m *= a[i];
  rep(i, 1, nb) if(i%2) n *= b[i]; else m *= b[i];

  int g = gcd(abs(n), abs(m));
  if(m < 0) n *= -1, m *= -1;
  cout << n/g << " " << m/g << endl;

  return 0;
}