Average of 4 numbers

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

namespace homework_2
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1;
            int num2;
            int num3;
            int num4;
            int sum;
            double avg;
            Console.WriteLine("Insert The First Number: ");
            num1 = int.Parse(Console.ReadLine());
            Console.WriteLine("Insert The Second Number:");
            num2 = int.Parse(Console.ReadLine());
            Console.WriteLine("Insert The Third Number: ");
            num3 = int.Parse(Console.ReadLine());
            Console.WriteLine("Insert The Fourth Number");
            num4 = int.Parse(Console.ReadLine());
            sum = num1 + num2 + num3 + num4;
            avg = sum / 4;
            Console.WriteLine("The Average Of The Four Numbers You Entered is :"+avg);
            Console.ReadLine();

        }
    }
}