[StartCode]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int[,] places = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
            int sum = 0;
            int product = 0;

            for (int i = 0; i < places.GetLength(0); i++)
            {
                for (int j = 0; j < places.GetLength(1); j++)
                {
                    Console.Write(places[i, j]);
                }
                Console.WriteLine();
            }
            sum = places[1, 0] + places[1, 1] + places[1, 2];
            product = places[0, 0] * places[1, 0] * places[2, 0];
            Console.WriteLine("Сумма второй строки " + sum + ". Произведение первого столбца " + product + ".");
        }
    }
}
[EndCode]