#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <vector>
#include <string>
#include <array>
#include <queue>
#include <deque>
#include <set>
#include <list>
#include <map>
#include <stack>
#include <utility>
#include <algorithm>
#include <numeric>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cctype>
#include <cstring>
#include <climits>
#include <bitset>
#include <random>
#include <functional>
#include <sstream>
#include <iomanip>

using namespace std;

#define rep(i, n) for(int i=0; i<(n); i++)
#define FOR(i, m, n) for(int i=(m);i<(n);i++)
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
#define SORT(x) sort((x).begin(),(x).end())
#define REVE(x) reverse((x).begin(),(x).end())
#define mp make_pair
#define pb push_back

typedef vector<int> VI;
typedef vector<string> VS;
typedef vector<vector<int>> VVI;
typedef pair<int, int> PII;
typedef long long LL;

//最大公約数
LL gcd(LL n, LL m) {
	if (m == 0)return n;
	return gcd(m, n%m);
}

//最小公倍数
LL lcm(LL n, LL m) {
	LL g = gcd(n, m);
	return n / g * m;
}

pair<LL, LL> abc(LL a, LL b) {
	LL g = gcd(a, b);
	return mp(a / g, b / g);
}

int main() {
	LL n; cin >> n;
	vector<LL> a(n); rep(i, n)cin >> a[i];
	LL m; cin >> m;
	vector<LL> b(m); rep(i, m)cin >> b[i];

	while (sz(a) > 2) {
		LL x = a[1] * a[2];
		a.erase(a.begin() + 1);
		a.erase(a.begin() + 1);
		a.insert(a.begin() + 1, x);
		pair<LL, LL> a3 = abc(a[0], a[1]);
		a[0] = a3.first;
		a[1] = a3.second;
	}
	while (sz(b) > 2) {
		LL x = b[1] * b[2];
		b.erase(b.begin() + 1);
		b.erase(b.begin() + 1);
		b.insert(b.begin() + 1, x);
		pair<LL, LL> b3 = abc(b[0], b[1]);
		b[0] = b3.first;
		b[1] = b3.second;
	}
	LL A = a[0] * b[1], B = b[0] * a[1];
	LL g = gcd(A, B);
	cout << A / g << " " << B / g << endl;
}