#include <iostream>
using namespace std; 
int a[20];
double b[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
int main() 
{
	double sum=0;
	for(int i=0;i<10;i++)
	{
		cin>>a[i];
		sum+=a[i]*b[i];
	}
	printf("%.1lf",sum);
	
	return 0;
}