#include<bits/stdc++.h> using namespace std; int a[10]; int main(){ double b[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65}; double s=0; for(int i=0;i<10;i++){ cin>>a[i]; } for(int i=0;i<10;i++){ s+=a[i]*b[i]; } cout<<s; return 0; }