#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    int N, M;
    cin >> N;
    vector<int> A(N);
    for (int& x : A) cin >> x;
    cin >> M;
    vector<int> B(M);
    for (int& x : B) cin >> x;

    int U = A[0], D = 1;
    for (int i = 1; i < N; i++) D *= A[i];
    for (int i = 0; i < M; i++){
        if (i%2 == 0) D *= B[i];
        else U *= A[i];
    }

    int G = gcd(U, D);
    U /= G, D /= G;
    if (D < 0) U *= -1, D *= -1;
    cout << U << ' ' << D << endl;
}