#include <iostream>
using namespace std;
class base
{
    public:
    int x;
    void getdata()
    {
    cout<<"\n The value of x : ";
    cin>>x;
    }
};
class derive1:public base
{
    public:
    int y;
    void readdata()
    {
    cout<<"\n The value of y : ";
    cin>>y;
    }
};
class derive2:public derive1
{
    int z;
    public:
    void indata()
    {
     cout<<"\n The value of z : ";
     cin>>z;
    }
    void display()
    {
        cout<<"\n The x value : "<<x;
        cout<<"\n The y value : "<<y;
        cout<<"\n The z value : "<<z;
        cout<<"\n The product is : "<<x*y*z;
    }
};
int main() {
    derive2 d;
    d.getdata();
    d.readdata();
    d.indata();
    d.display();
    return 0;
}