#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
int gcd(int a,int b){return b?gcd(b,a%b):a;}
#define MOD 1000000007

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n,a,b=1,c,g;
    bool m=false;
    cin >> n;
    cin >> a;
    if(a<0) {
        a=-a;
        m^=true;
    }
    rep(i,n-1) {
        cin >> c;
        b*=c;
        if(b<0) {
            b=-b;
            m^=true;
        }
    }
    cin >> n;
    rep(i,n) {
        cin >> c;
        if (i%2==1) {
            a*=c;
            if(a<0) {
                a=-a;
                m^=true;
            }
        }
        else {
            b*=c;
            if(b<0) {
                b=-b;
                m^=true;
            }
        }
    }
    g=gcd(a,b);
    a/=g;
    b/=g;
    if (m) {
        a=-a;
    }
    cout << a << " " << b << endl;
    return 0;
}