using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        //decimal znesek = 63.75M;

        decimal znesek = 14.31M;

        //int stObrokov = 5;

        int stObrokov = 5;

        decimal prviObrok = 0;      

        prviObrok = ArithmeticRound((znesek / (stObrokov + 1)) , 2);

        Console.WriteLine(string.Format("First payment {0}", prviObrok));

​

    }

    private static decimal ArithmeticRound(decimal d, int decimals)

    {

        decimal integerPart = Decimal.Truncate(d);

        decimal decimalPart = d - integerPart;

        decimal power = (decimal)System.Math.Pow(10, decimals);

        decimal result = decimal.Floor((System.Math.Abs(decimalPart) * power) + 0.5m) / power;

        result = result * System.Math.Sign(d);

        result += integerPart;

        return result;

    }

}