public static void Main()
Console.WriteLine("Hello World");
Console.WriteLine(Math.Round(a,4,MidpointRounding.AwayFromZero));
Console.WriteLine(Math.Round(b,4,MidpointRounding.AwayFromZero));
Console.WriteLine(Math.Round(a,5,MidpointRounding.AwayFromZero));
Console.WriteLine(Math.Round(b,5,MidpointRounding.AwayFromZero));