#include<iostream>
using namespace std;
int main(){
    int a,b,c,d,e,f,g;
    double n;
    cin>>a>>b>>c>>d>>e>>f>>g;
    n=a*1.29+b*2.7+c*1.1+d*0.92+e*1+f*0.1+g*0.9;
    printf("%.2lf",n);
    
}