using System;

public class Program

{

    public static void Main()

    {

        Divisao d = new Divisao();

        d.num1 = 2f;

        d.num2 = 0f;

        Console.WriteLine("Hello World  "+d.Div(d.num1, d.num2).ToString());

    }

}

​

public class Calculadora {

    public float num1;

    public float num2;

    public Calculadora(){}

    public Calculadora(float n1, float n2){

        num1 = n1;

        num2 = n2;

    }

}

​

public class Divisao : Calculadora{

​

    public float Div(float z, float k){

        Console.WriteLine("Hello World  " +z);

        Console.WriteLine("Hello World  " +(z/k));

        return z /k;

    }

}