// includes
#include <cstdio>
#include <cstdint>
#include <iostream>
#include <iomanip>
#include <string>
#include <queue>
#include <stack>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <algorithm>
#include <utility>
#include <functional>
#include <cmath>
#include <climits>
#include <bitset>
#include <list>
#include <random>

// macros
#define ll long long int
#define pb emplace_back
#define mk make_pair
#define pq priority_queue
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define rep(i, n) FOR(i, 0, n)
#define rrep(i, n) for(int i=((int)(n)-1);i>=0;i--)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end())

using namespace std;

//  types
typedef pair<int, int> P;
typedef pair<ll, int> Pl;
typedef pair<ll, ll> Pll;
typedef pair<double, double> Pd;
 
// constants
const int inf = 1e9;
const ll linf = 1LL << 50;
const double EPS = 1e-10;
const int mod = 1e9 + 7;

// solve
template <class T>bool chmax(T &a, const T &b){if(a < b){a = b; return 1;} return 0;}
template <class T>bool chmin(T &a, const T &b){if(a > b){a = b; return 1;} return 0;}

template<typename T>
T gcd(T a, T b) {
  if(a > b)return gcd(b, a);
  if(a == 0)return b;
  return gcd(b % a, a);
}

int main(int argc, char const* argv[])
{
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n1, n2;
  cin >> n1;
  vector<ll> a(n1);
  rep(i, n1)cin >> a[i];
  cin >> n2;
  vector<ll> b(n2);
  rep(i, n2)cin >> b[i];
  ll num1 = 1;
  for(int i = 1; i < n1; i++)num1 *= a[i];
  for(int i = 0; i < n2; i++){
    if(i % 2 == 0)num1 *= b[i];
    else a[0] *= b[i];
  }
  if((num1 % 2) * (a[0] % 2) < 0)cout << "-";
  num1 = abs(num1);
  a[0] = abs(a[0]);
  ll tmp = gcd(num1, a[0]);
  cout << a[0] / tmp << " " << num1 / tmp << endl;
	return 0;
}