[StartCode]
using System;

namespace ConsoleApp28
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Random random = new Random();
            int multipleNumber = 0;
            int minimumNumber = 1;
            int maximumNumber = 28;
            int naturalMinimumNumber = 100;
            int naturalMaximumNumber = 999;
            int number = random.Next(minimumNumber, maximumNumber);

            for (int i = 0; i <= naturalMaximumNumber; i += number)
            {
                if (i >= naturalMinimumNumber)
                {
                    multipleNumber++;
                }
            }

            Console.WriteLine($"{multipleNumber} трехзначных натуральных числа кратных {number}");
        }
    }
}
[EndCode]