using System;

​

public class Program

{

    public static void Main()

    {

        float a = 3.1416F;

        int b = 7;

        float c = 0;

        c = a * (b * b);

        Console.WriteLine("Irvin Rojas Programa 3");

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

    }

}