Compile and Execute C# Sharp Online

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            double pi = 3.14;
            int radius = 10  ;
            double result = pi * (radius * radius);

            Console.WriteLine("The area of the circle is {0} * ({1} * {1}) = {2} ", pi, radius, result);
            Console.ReadLine();

        }
    }
}