using System;

using System.Collections.Generic;

//Area of a Circle

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input the radius of the circle: ");

        double radcir = Convert.ToDouble(Console.ReadLine());

        Console.WriteLine("The area of the Circle is " + RadiusOfACircle(radcir));

    }

    public static double RadiusOfACircle(double radcir)

    {

        double pi = 3.14;

        double Area;

        double squared = radcir * radcir;

        Area = pi * squared;

        return Area;

    }

}