#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
	long long int a[10001]; 
	int m1,m2,m3,m4,m5,m6,m7,m8,m9,m10;
	for(int i=1;i<=10;i++)
		cin>>a[i];
    m1 = a[1]*28.9;
    m2 = a[2]*32.7;
    m3 = a[3]*45.6;
    m4 = a[4]*78;
    m5 = a[5]*35;
    m6 = a[6]*86.2;
    m7 = a[7]*27.8;
    m8 = a[8]*43;
    m9 = a[9]*56;
    m10 = a[10]*65;
 printf("%.1lf",m1+m2+m3+m4+m5+m6+m7+m9+m10);
}