#include <bits/stdc++.h>
#include <unordered_set>
using namespace std;
#define ll long long
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define repeat(i,s,n) for(int (i)=s; (i)<(n); (i)++)
#define revrep(i,n) for(int (i)=(n)-1;i>=0; i--)

ll gcd(ll a, ll b) { return b ? gcd(b,a%b) : a; }

pair<ll,ll> rec(vector<ll>& a, int s, int n) {
  if(s==n-1) return make_pair(a[s],1LL);
  ll u,l;
  tie(u,l) = rec(a,s+1,n);
  return make_pair(a[s]*l,u);
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout<<setprecision(std::numeric_limits<float>::max_digits10);
  int n1; cin>>n1;
  vector<ll> a(n1);
  rep(i,n1)cin>>a[i];
  int n2; cin>>n2;
  vector<ll> b(n2);
  rep(i,n2)cin>>b[i];
  ll au,al;
  au = a[0];
  al = 1;
  repeat(i,1,n1) {
    al*=a[i];
  }
  ll bu,bl;
  bu=b[n2-1];
  bl=1;
  for(int i=n2-2; i>=0; i--) {
    ll t = bl;
    bl=bu;
    bu=t*b[i];
  }
  ll U = au*bl;
  ll L = al*bu;
  if(L<0) {
    U*=-1;
    L*=-1;
  }
  ll g = gcd(abs(U),abs(L));
  //cout << U << " " << L << " " << g<< endl;
  cout << U/g << " " << L/g << endl;
  return 0;
}