using System;

public class Program

{

    public static void Main()

    {

        //Write a program that reads the radius r of a circle and prints its perimeter and area formatted with 2 digits after the decimal point. 

            //Examples: r   perimeter   area

            //          2       12.57   12.57

            //          3.5     21.99   38.48

​

​

            double r = double.Parse(Console.ReadLine());

​

            Console.WriteLine("The perimeter f circle is: {0:F2}", Math.PI * 2 * r);

            Console.WriteLine("The area of circle is: {0:F2}", Math.PI * r * r);

    }

}