//Time 0ms, Memory 568KB
#include<iostream> #include<cmath> #include<iomanip> using namespace std; const double pi=2.0*asin(1.0); int main() { double a,b,h,v; int t,i=1; cin>>t; while(t--) { cin>>a>>b>>h; if(h>b) h=b; v=pi*a*b*(h-h*h*h/(3*b*b)+2*b/3); cout<<"Case "<<i++<<": "; cout<<fixed<<setprecision(3)<<v<<endl; } return 0; }