#include<iostream>
#include<iomanip>
#include<math.h>
using namespace std;
int main(){
	double a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,s;
	cin>>a1>>a2>>a3>>a4>>a5>>a6>>a7>>a8>>a9>>a10;
	s=a1*28.9+a2*32.7+a3*45.6+a4*78+a5*35+a6*86.2+a7*27.8+a8*43+a9*56+a10*65;
	cout<<fixed<<setprecision(1)<<s; 
}