#include<iostream>
using namespace std;

int gcd(int a,int b){
    int r;
    while((r=a%b) != 0){
        a = b;
        b = r;
    }
    return b;
}

int main(){
    
    //input
    int numerator_num;
    cin >> numerator_num;
    int num_comp[numerator_num];
    for(int i=0;i<numerator_num;i++){
        cin >> num_comp[i];
    }
    int denominator_num;
    cin >> denominator_num;
    int den_comp[denominator_num];
    for(int i=0;i<denominator_num;i++){
        cin >> den_comp[i];
    }
    
    int output_numerator = 1;
    int output_denominator = 1;
    
    //calc
    for(int i=numerator_num-1;i>=0;i--){
        if(i==0)output_numerator *= num_comp[i];
        else output_denominator *= num_comp[i];
    }
    
    for(int i=denominator_num-1;i>=0;i--){
        if(i%2 == 1) output_numerator *= den_comp[i];
        else output_denominator *= den_comp[i];
    }
    
    if(output_denominator<0){
        output_denominator *= -1;
        output_numerator *= -1;
    }
    
    //calc_gcd
    int GCD = gcd(output_numerator,output_denominator);
    cout << output_numerator/abs(GCD) << " " << output_denominator/abs(GCD) << endl;
    return 0;
}