✅ my code to calculate an average seems to be wrong

using System;
using System.Reflection.Metadata;

namespace startover 
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //window setting
            Console.Title = "window name";
            Console.ForegroundColor = ConsoleColor.Green;
            Console.WindowHeight = 40;
            //main part of program
            int x;
            int y;
            int z;


            Console.Write("whats x? ");
            x = Convert.ToInt32( Console.ReadLine());

            Console.Write("whats y? ");
            y = Convert.ToInt32( Console.ReadLine());

            Console.Write("whats z? ");
            z = Convert.ToInt32( Console.ReadLine());

            int result = z+y+x/3;
            Console.WriteLine(result);


            
            Console.ReadKey();
        }
    }
}