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