using System;

public class Program

{

    public static void Main()

    {

        //obtener un area de un circulo

        float a=15;

        float b=a*a;

        float c=b*3.1416f;

        //A=3.14·r2;

        Console.WriteLine("Yareli Hernandez Ledezma");

        Console.WriteLine("");

        Console.WriteLine("El area del circulo es {0} ", c);

        //{} 

    }

}