using System;

public class Program

{

    static private double avg(double a, double b, double c, double d)

    {

    return (a+b+c+d)/4; 

    }

    public static void Main()

    {

        Console.WriteLine("Please enter the four numbers you would like to find the average of");

        double input = double.Parse(Console.ReadLine());

        double input2 = double.Parse(Console.ReadLine());

        double input3 = double.Parse(Console.ReadLine());

        double input4 = double.Parse(Console.ReadLine());

        Console.WriteLine("The average of the four numbers is " + avg(input, input2, input3, input4));

    }

}