using System;

public class Program

{

    public static void Main()

    {

        double a = 8.35;

        double b = 7.8;

        double multiple = 0.5;

        Console.WriteLine((a * multiple) + (b * multiple));

        Console.WriteLine(Math.Round((a * multiple) + (b * multiple), 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round((a * multiple) + (b * multiple), 2, MidpointRounding.ToEven));

        Console.WriteLine(Math.Round((a * multiple) + (b * multiple), 2, MidpointRounding.ToZero));

        Console.WriteLine(Math.Round((a * multiple) + (b * multiple), 2, MidpointRounding.ToPositiveInfinity));

        Console.WriteLine(string.Empty);

        Console.WriteLine(Math.Round(808.5, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(807.5, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(-807.5, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(-808.5, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(8.085, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(8.075, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(-8.075, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(-8.085, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(-1.055, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(1.055, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(1.065, 2, MidpointRounding.AwayFromZero));

        Console.WriteLine(Math.Round(-1.065, 2, MidpointRounding.AwayFromZero));

    }

}