using System;

public class Program

{

    public static void Main()

    {

        Double number1,number2,number3,number4;

        Console.Write("Enter First number:");

        number1=Convert.ToDouble(Console.ReadLine());

        Console.Write("Enter Second number:");

        number2=Convert.ToDouble(Console.ReadLine());

        Console.Write("Enter First number:");

        number3=Convert.ToDouble(Console.ReadLine());

        Console.Write("Enter Four number");

        number4=Convert.ToDouble(Console.ReadLine());

        Double sum=(number1+number2+number3+number4)/4;

        Console.WriteLine("The Average is :"+ sum);

    }

}