using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(String.Format("{0:0.####}", 123.4567));

        Console.WriteLine(String.Format("{0:0.####}", 123.456));

        Console.WriteLine(String.Format("{0:0.####}", 123.45));

        Console.WriteLine(String.Format("{0:0.####}", 123.4));

    }

}