Cube Properties

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

namespace CubeProperties
{
    class Program
    {
        static void Main(string[] args)
        {
            decimal inputNum = decimal.Parse(Console.ReadLine());
            string inputString = Console.ReadLine();

            CubeProperties(inputNum, inputString);
        }

        private static void CubeProperties(decimal inputNum, string inputString)
        {
            switch (inputString)
            {
                case "face":
                    Console.WriteLine("{0:0.00}", Math.Sqrt(2*Math.Pow((double)inputNum, 2)));
                    break;
                case "space":
                    Console.WriteLine("{0:0.00}", Math.Sqrt(3 * Math.Pow((double)inputNum, 2)));
                    break;
                case "volume":
                    Console.WriteLine("{0:0.00}", Math.Pow((double)inputNum, 3));
                    break;
                case "area":
                    Console.WriteLine("{0:0.00}", 6 * (inputNum * inputNum));
                    break;
                default:
                    break;
            }
        }
    }
}