#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <random>
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;
ll gcd(ll a, ll b){
	if(b==0) return a;
	return gcd(b, a%b);
}
int main()
{
	int n1;
	cin>>n1;
	int p=1;
	ll a1; cin>>a1;
	ll a2=1;
	for(int i=1; i<n1; i++){
		ll a; cin>>a; a2*=abs(a);
		p*=(a/abs(a));
	}
	int n2; cin>>n2;
	ll b1=1, b2=1;
	for(int i=0; i<n2; i++){
		ll b; cin>>b;
		if(i%2) b2*=abs(b);
		else b1*=abs(b);
		p*=(b/abs(b));
	}
	ll c1=a1*b2, c2=a2*b1;
	ll g=gcd(c1, c2);
	cout<<c1/g*p<<" "<<c2/g<<endl;
	return 0;
}