using System;

public class Program

{

    public static void Main()

    {

            double a, b, mediaP;

​

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

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

            //complete com as variaveis

            mediaP = ((a  * 3.5) + (b  * 7.5)) / (3.5 + 7.5);

​

            Console.WriteLine("MEDIA = {0}", mediaP.ToString("0.00000"));

    }

}