Кратные числа

using System;

namespace CSLight
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int userInput;
            int smallerNumber = 50;
            int largerNumber = 150;
            int smallerDeduction = 10;
            int largerDeduction = 25;
            int quantityNumber = 0;

            Console.WriteLine($"Ваш диапазон чисел ({smallerNumber},{largerNumber})");
            Console.Write($"Введите число (>= {smallerDeduction}) и (<= {largerDeduction}): ");
            userInput = Convert.ToInt32(Console.ReadLine());

            if (userInput < smallerDeduction || userInput > largerDeduction)
            {
                Console.WriteLine($"\nНеверное число. \n");
                return;
            }

                for (int i = 0; i <= largerNumber; i += userInput)
            {
                if (i < smallerNumber)
                {
                    continue;
                }

                quantityNumber++;

            }

            Console.WriteLine(quantityNumber);
        }
    }
}