Task 9

    class Program
    {
        static void Main(string[] args)
        {
            Random random = new Random();

            int minRandomNumber = 1;
            int maxRandomNumber = 27;
            int minNumber = 100;
            int maxNumber = 999;
            int randomNumber = random.Next(minRandomNumber, maxRandomNumber + 1);
            int countMultiplesNumber = 0;

            for (int i = randomNumber; i <= maxNumber; i += randomNumber)
            {
                if (i >= minNumber)
                {
                    countMultiplesNumber++;
                }
            }

            Console.WriteLine($"{randomNumber} : {countMultiplesNumber}");
        }
    }