#include<bits/stdc++.h>
using namespace std;
int gojoho(int a, int b){
    while(1){
        b %= a;
        if(b==0) break;
        else swap(a,b);
    }
    return a;
}
int main(){
    int Bunbo=1;
    int Bunshi=1;
    int A;
    int B;
    int Na, Nb;
    int i;
    int Kouyakusu;
    scanf("%d", &Na);
    for(i=0; i<Na; i++){
        scanf("%d", &A);
        if(i==0) Bunshi *= A;
        else Bunbo *= A;
    }
    scanf("%d", &Nb);
    for(i=0; i<Nb; i++){
        scanf("%d", &B);
        if(i%2==0) Bunbo *= B;
        else Bunshi *= B;
    }
    Kouyakusu = gojoho(Bunbo,Bunshi);
    Bunbo /= Kouyakusu;
    Bunshi /= Kouyakusu;
    if(Bunbo<0){
        Bunbo*=-1;
        Bunshi*=-1;
    }
    printf("%d %d", Bunshi, Bunbo);
    return 0;
}