#include<bits/stdc++.h>
using namespace std;
int main()
{
    double a=0;
    for(int i=1;i<=5;i++)
    {
        int n;
        cin>>n;
        if(i==1)a+=double(n)*28.9;
        else if(i==2)a+=double(n)*32.75;
        else if(i==3)a+=double(n)*45.6;
        else if(i==4)a+=double(n)*78.0;
        else a+=double(n)*35.7;
    }
    cout<<a;
}