#include<bits/stdc++.h>
using namespace std;
double mon[10]{28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
int num[10]{};
int main(){
	double all;
	for (int i=0;i<=9;i++){
		cin>>num[i];
	}
	for (int j=0;j<=9;j++){
		all+=num[j]*mon[j];
	}
	printf("%.1lf",all);
}