task3

using System;

public class Program
{
    public static void Main()
    {
        uint crystalsPrice = 300;

        uint goldAmount = 0;
        uint crystalsAmount = 0;

        string crystalsPriceStr = String.Format("Price of crystal is : {0}\n", crystalsPrice);

        Console.WriteLine(crystalsPriceStr);

        Console.WriteLine("Please input amount of gold : ");
        goldAmount = Convert.ToUInt32(Console.ReadLine());

        crystalsAmount = goldAmount / crystalsPrice;
        goldAmount -= (crystalsAmount * crystalsPrice);

        string crystalsAmountString = String.Format("Amount of bought crystals : {0}", crystalsAmount);
        string goldAmountString = String.Format("Amount of gold : {0}", goldAmount);

        Console.WriteLine(crystalsAmountString);
        Console.WriteLine(goldAmountString);
    }
}