using System;

public class Program

{

    public static void Main()

    {

        float a=3.1416f;

        float b=15;

        float c= a*(b*b);

        Console.WriteLine("Luis Alejandro Torres Hernandez Programa2");

        Console.WriteLine("El area de un circulo con radio de: {0} es de: {1}",b,c);

    }

}