using System;
using System.Globalization;
public class MainClass
{
public static void Main()
{
double value = 86000;
Console.WriteLine(value.ToString("0.###E+0", CultureInfo.InvariantCulture));
Console.WriteLine(value.ToString("0.###E+000", CultureInfo.InvariantCulture));
Console.WriteLine(value.ToString("0.###E-000", CultureInfo.InvariantCulture));
}
}
/*
8.6E+4
8.6E+004
8.6E004
*/