data typed

using System;
using System.Linq;
using System.Collections.Generic;
using System.Numerics;
using System.Text;

namespace exampreparation
{
    class exam
    {
        static void Main(string[] args)
        {
            string type = Console.ReadLine();
            string data = Console.ReadLine();

            Overload(type,data);
        }

        static void Overload(string type, string data)
        {
            if (type == "int")
            {
                int dataInt = int.Parse(data);
                dataInt *= 2;
                Console.WriteLine(dataInt);
            }
            else if (type == "real")
            {
                double dataDouble = double.Parse(data);
                dataDouble *= 1.5;
                Console.WriteLine($"{dataDouble:F2}");
            }
            else if (type == "string")
            {
                Console.WriteLine($"${data}$");
            }


        }
    }
}