#include<bits/stdc++.h> using namespace std; int main(){ char hy; double je; cin>>hy>>je; if(hy=='P'){ printf("%.2lf",je*0.7); }else if(hy=='G'){ printf("%.2lf",je*0.8); }else if(hy=='S'){ printf("%.2lf",je*0.9); }else if(hy=='M'){ printf("%.2lf",je*0.95); } return 0; }