#include <bits/stdc++.h>
using namespace std;
double s=0;
int a[15];
int main(){
   for(int i=1;i<=10;i++){
		cin>>a[i];
   }
   s+=a[1]*28.9;
   s+=a[2]*32.7;
   s+=a[3]*45.6;
   s+=a[4]*78;
   s+=a[5]*35;
   s+=a[6]*86.2;
   s+=a[7]*27.8;
   s+=a[8]*43;
   s+=a[9]*56;
   s+=a[10]*65;
	cout<<s;
}