#include<queue>
#include<math.h>
#include<stack>
#include<stdio.h>
#include<iostream>
#include<vector>
#include<iomanip>
#include<string.h>
#include<algorithm>
#include<bits/stdc++.h>
using namespace std;
double a[11]={0,28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
int main()
{
	int x;
	double sum=0.0;
	for(int i=1;i<=10;i++)
	{
		cin>>x;
		sum+=a[i]*x;
	}
	cout<<fixed<<setprecision(1)<<sum<<endl;
}