Картинки

using System;

namespace CSLight
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int images = 52;
            int imagesInOneRow = 3;
            int numberRowsWithImages = images / imagesInOneRow;
            int remainsImages = images % imagesInOneRow;

            Console.WriteLine($"У вас {numberRowsWithImages} рядов");
            Console.WriteLine($"И остаток: {remainsImages}");
        }
    }
}