#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int a,s,d,f,g,h,j;
    cin>>a>>s>>d>>f>>g>>h>>j;
    printf("%.2f",a*1.29+s*2.7+d*1.1+f*0.92+g*1+h*0.1+j*0.9);
}