What is it missing beginner task?

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

namespace Sav
{
    class Program
    {
        static void Main(string[] args)
        {
            char simbolis;
            int k;
            int x;
            int a = 0;
            Console.Write("iveskite norima kieki: ");
            k = int.Parse(Console.ReadLine());
            Console.Write("iveskite simboliu kieki eiluteje: ");
            x = int.Parse(Console.ReadLine());
            Console.Write("Įveskite spausdinamą simbolį: ");
            simbolis = (char)Console.Read();
            a = k / x;
            int b = k % x;
            for (int i = 1; i <= a; i++)
            {
                for (int j = 1; j<=x; j++)
                {
                        Console.Write(simbolis);
                }
                Console.WriteLine();
            }
            if ( b > 0)
            {
                Console.Write(simbolis);
            }
        }
    }
}