#include<iostream>
#include<algorithm>
using namespace std;
double a, b;
double between_num(double a, double b){
return (a * 3.5 + b * 7.5) / 11;
}
int main(){
cin >> a >> b;
double t = between_num(a, b);
printf("MEDIA = %.5lf", t);
return 0;
}