#include<iostream> using namespace std; int main(){ int a[11]; double b[11]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65}; for(int i=0;i<10;i++) cin>>a[i]; double sum=0; for(int i=0;i<10;i++) sum+=a[i]*b[i]; printf("%.1f",sum); return 0; }