#include <bits/stdc++.h>

using namespace std;

int main() {
    float price[10] = {28.9, 32.7, 45.6, 78, 35, 86.2, 27.8, 43, 56, 65};
    float total = 0;
    for (int i = 0; i < 10; ++i) {
        int a;
        cin >> a;
        total += price[i] * a;
    }
    //C语言写法
    printf("%.1f\n", total);
    //C++写法
    cout << fixed << setprecision(1) << total << endl;
    return 0;
}