#include<iostream>
using namespace std;
int main(){
int a,b,c,d,e,f,g;
double h;
cin>>a>>b>>c>>d>>e>>f>>g;
h=1.29*a+2.7*b+1.1*c+0.92*d+e+0.1*f+0.9*g;
printf("%.2lf",h);
}