#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,i,j,d;
	double c,b[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
	for(i=0;i<10;i++)
	{
		cin>>d;
		c+=d*b[i];
	}
	cout<<fixed<<setprecision(1)<<c;
}