#include<bits/stdc++.h>
using namespace std;
int main()
{
	int b4=78,b5=35,b8=43,b9=56,b10=65,sum,sum1,sum2,sum3,sum4,sum5,sum6,sum7,sum8,sum9,sum10;
	double b1=28.9,b2=32.7,b3=45.6,b6=86.2,b7=27.8;
	cin>>sum1>>sum2>>sum3>>sum4>>sum5>>sum6>>sum7>>sum8>>sum9>>sum10;
	cout<<b1*sum1+b2*sum2+b3*sum3+b4*sum4+b5*sum5+b6*sum6+b7*sum7+b8*sum8+b9*sum9+b10*sum10;
	return 0;
}