using System;

 class Circle
 {
     static void Main()
     {
         double pi = Math.PI, ar, p;
         Console.Write("Enter the radius of the circle: ");
         double r = double.Parse(Console.ReadLine());
         p = (2*pi) * r;
         ar = Math.Pow(r, 2) * pi;
         Console.WriteLine("The perimeter of the circle is: {0:F2}", p);
         Console.WriteLine("The area of the circle is: {0:F2}", ar);
     }
 }