#include<bits/stdc++.h>

using namespace std;

int main(){

double a[10]=

{28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};

int n;

double s=0;

for(int i=0; i<=9; i++){

	cin>>n;

	s+=a[i]*n;

}

printf("%.1lf",s);

return 0;

}