import java.util.Scanner;
public class Main{
public static void main(String[]args)throws Exception{
Scanner sc = new Scanner(System.in);
double a= sc.nextDouble();
double b=sc.nextDouble();
double p1=3.5/11;
double p2=7.5/11;
double p3=a*p1+b*p2;
System.out.printf("MEDIA = %.5f",p3);
}
}