#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; int main(){ char a; double b,c; cin>>a>>b; if(a=='P') { c=b*0.7; } else if(a=='G') { c=b*0.8; } else if(a=='S') { c=b*0.9; } else{ c=b*0.95; } printf("%.2lf",c); return 0; }