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