#include <iostream>
#include <vector>
#include <algorithm>
#include <string.h>
#include <iomanip>
#include <math.h>
#include <string>
#include <queue>
#include <map>
#include <set>
#include <functional>

using namespace std;

typedef long long int ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll, int> pli;
typedef std::pair<ll, ll> pll;

#define FOR(i,n,m) for(ll i=(ll)(m);i<(ll)(n);++i)
#define REP(i,n) FOR(i,n,0)
#define IREP(i,n) for(ll i=(ll)(n);i>=0;--i)
#define OF64 std::setprecision(10)

const ll MOD = 1000000007;
const ll INF = (ll)1e15;

int A[20], B[20];

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

int main()
{
	int n;
	cin >> n;
	REP(i, n)
	{
		cin >> A[i];
	}
	int m;
	cin >> m;
	REP(i, m)
	{
		cin >> B[i];
	}

	int x = A[0], y = B[0];
	REP(i, m - 1)
	{
		x *= B[1 + i];
	}
	REP(i, n - 1)
	{
		y *= A[1 + i];
	}
	//REP(i, max(n, m) - 1)
	//{
	//	int a = i < n - 1 ? A[i] : 1;
	//	int b = i < m - 1 ? B[i] : 1;
	//	int k = a*b / gcd(abs(a), abs(b));
	//	x *= k / a; y *= k / b;
	//}

	int sign = x*y / abs(x*y);
	int k = gcd(abs(x), abs(y));
	cout << sign*abs(x) / k << " " << abs(y) / k << endl;
	return 0;
}