answer

#include<iostream> // cin\cout\endl
#include<cstdio> //scanf()\printf()
#include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset()

#include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min()
using namespace std;
double a;
char x;
int main(){
cin>>x>>a;
if(x=='P'){
printf("%.2lf",a*7/10);
}else if(x=='G'){
printf("%.2lf",a*8/10);
}else if(x=='S'){
printf("%.2lf",a*9/10);
}else{
printf("%.2lf",a*95/100);
}
return 0;
}