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"));
}