#import<iostream>
using namespace std;
float s,n;
int a[15],i;
int main(){
		
	for(int i=0;i<10;i++){
		cin>>a[i];
		if(i==0) n=28.9;
		if(i==1) n=32.7;
		if(i==2) n=45.6;
		if(i==3) n=78.0;
		if(i==4) n=35.0;
		if(i==5) n=86.2;
		if(i==6) n=27.8;
		if(i==7) n=43.0;
		if(i==8) n=56.0;
		if(i==9) n=65.0;
		s+=a[i]*n;
	}cout<<s;
	
	return 0;
}