dort_basamaklı_çarpım

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication19
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 1000; i <= 9999; i++)
            {
                string sayi = i.ToString();
                string tersi = "";

                for (int k = 3; k >= 0; k--)
                {
                    tersi = tersi + sayi[k].ToString();
                }

                if (Convert.ToInt32(tersi) * 4 == Convert.ToInt32(sayi))          //Convert.ToInt32(tersi) * 4 == i
                {
                    Console.WriteLine("Bulunan sayı: {0}'dir", i);
                    break;
                }
            }
            Console.ReadLine();

        }
    }
}