Methods-Ex\More\Data Types

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

namespace methods_exerci
{
    class Program
    {
        static void Main(string[] args)
        {
            string text = Console.ReadLine();
            string amount = Console.ReadLine();

            DataTypes(text, amount);
        }

        static void DataTypes(string text, string amount)
        {

            switch (text)
            {
                case "int":
                    int number = int.Parse(amount);
                    Console.WriteLine(number * 2);
                    break;
                case "real":
                    double number1 = double.Parse(amount);
                    Console.WriteLine("{0:f2}", number1 * 1.5);
                    break;
                case "string":
                    Console.WriteLine($"${amount}$");
                    break;
            }
        }
    }
}