#include <bits/stdc++.h>
#include<iostream>
#include<math.h>
#define pi 2*acos(0.0)
using namespace std;
int main()
{
double n,x,y,a,R,r,A,A1,A2,spect,offic;
int c=0;
while(scanf("%lf %lf",&n,&A)==2 && n>=3)
{
r=sqrt((2*A)/(n*sin(2*pi/n))); //2. Given the radius (circumradius); area(A)=((r^2)nsin(360/n)/2)
R=sqrt( A/(n*tan(pi/n))); //Given the apothem (inradius) area=a^2 ntan(180/n);
//printf("Case %d: %.5lf %.5lf\n",i,R,r);
A1=pi*r*r;
A2=pi*R*R;
spect = A1-A;
offic = A-A2;
printf("Case %d: %.5lf %.5lf\n",c+1,spect,offic);
c++;
}
return 0 ;
}
