ac

#include <bits/stdc++.h>
using namespace std;
int main(){
    double a[10010];
    double b[199]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
    double sum=0;
    for(int i=0;i<=10;i++){
        cin>>a[i];//
        sum+=a[i]*b[i];
    }
    printf("%.1f",sum);
    return 0;
}