#include<bits/stdc++.h>
using namespace std;
int main(){
	int a[10];
	double sum=0,b[10]={28.9,32.7,45.6,78.0,35.0,86.2,27.8,43.0,56.0,65.0};
	for(int i=0;i<10;i++){
		cin>>a[i];
	}
	for(int i=0;i<10;i++){
		sum+=a[i]*b[i];
	}
	cout<<sum;
	return 0;
}

#include <bits/stdc++.h> using namespace std;

int main() { int a[10]; double sum=0.0,m; for(int i=0; i<10; i++) { cin>>a[i]; } for(int i=0; i<10; i++) { if(i0) m=28.9; if(i1) m=32.7; if(i2) m=45.6; if(i3) m=78.0; if(i4) m=35.0; if(i5) m=86.2; if(i6) m=27.8; if(i7) m=43.0; if(i8) m=56.0; if(i9) m=65.0; sum+=a[i]1.0m; } printf("%.1lf",sum); return 0; }

#include <bits/stdc++.h>

using namespace std;
int main(){
    double n,m=0,l=0;
    double a[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
    for(int i=0;i<10;i++){
        cin>>n;
        m=a[i]*n;
        l+=m;
    }
    cout<<l;
    return 0;
}