#include <algorithm>
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
#define ll long long
#define INF 1000000000000000000
typedef pair<ll, ll> pll;

long long GCD(long long a, long long b) {
    if (b == 0)
        return a;
    else
        return GCD(b, a % b);
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;
    ll A = 1, B = 1;
    rep(i, n) {
        ll a;
        cin >> a;
        if (i == 0)
            A = a;
        else
            B *= a;
    }

    int n1;
    cin >> n1;
    rep(i, n1) {
        ll a;
        cin >> a;
        if (i % 2)
            A *= a;
        else
            B *= a;
    }

    if (B < 0) {
        A = -A;
        B = -B;
    }

    ll tmp = GCD(abs(A), abs(B));
    cout << A / tmp << " " << B / tmp << endl;
}