AreaOfFigures

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

namespace Area_of_Figures
{
    class Program
    {
        static void Main(string[] args)
        {

            string name = Console.ReadLine();


            //string b = Console.ReadLine();


            if (name == "square")
            {
                var a = double.Parse(Console.ReadLine());
                Console.WriteLine("square");
                Console.WriteLine(Math.Round(a*a,3)) ;
            }

            else if (name == "rectangle")
            {
                var b = double.Parse(Console.ReadLine());
                var c = double.Parse(Console.ReadLine());
                Console.WriteLine("rectangle");
                Console.WriteLine(Math.Round(b * c,3));
            }

            else if (name == "circle")
            {
                var d = double.Parse(Console.ReadLine());
                Console.WriteLine("circle");
                Console.WriteLine(Math.Round(d * d*Math.PI,3));
            }


            else if (name == "triangle")
            {
                var e = double.Parse(Console.ReadLine());
                var f = double.Parse(Console.ReadLine());
                Console.WriteLine("triangle");
                Console.WriteLine(Math.Round(e * f/2,3));
            }




        }
    }
}