using System;

public class Program

{

    public static void Main()

    {

        decimal price = 123.72m;

        decimal rate = 0.02m;

        decimal fee = price * rate;

        Console.WriteLine("{0} {1} {2}", price, rate, fee);

​

        decimal lastFee = fee;

        int i=0;

        while(lastFee > 0.0001m) {

            i++;

            decimal d = lastFee * rate;

            fee += d;

            lastFee = d;

        }

        decimal rFee = Math.Round(fee, 2);

        decimal rPrice = Math.Round(fee + price, 2);

        Console.WriteLine("{0} {1} {2} {3} {4}", price, rate, fee, lastFee, i);

        Console.WriteLine("{0} {1}",rFee, rPrice);

​

    }

}