#include<stdio.h>
#include<math.h>
#define pi acos(-1)
int main()
{
    int t,i;
    double r1,r2,r3,b,a,c,m2,p=0.0,area=0.0,area2=0.0,area3=0.0,area1=0.0,areaF=0.0,s=0.0,m,n,ag,m1,n1,n2,ag1,ag2;
    scanf("%d",&t);
    for(i=1; i<=t; i++)
    {
        scanf("%lf %lf %lf",&r1,&r2,&r3);
           a=r1+r2;
           b=r2+r3;
           c=r3+r1;
           s=(a+b+c)/2;
           p=s*(s-a)*(s-b)*(s-c);
           area=sqrt(p);
           m=(b*b)+(c*c)-(a*a);
           n=(2*b*c);
           ag=acos(m/n);
            area1=((pi*r3*r3)/pi)*ag;
           m1=(c*c)+(a*a)-(b*b);
           n1=(2*a*c);
           ag1=(acos(m1/n1));
            area2=((pi*r1*r1)/pi)*ag1;
           m2=(a*a)+(b*b)-(c*c);
           n2=(2*b*a);
           ag2=(acos(m2/n2));
           area3=((pi*r2*r2)/pi)*ag2;
            areaF=area-(area1+area2+area3);
            printf("Case %d: %.8lf\n",i,areaF);
    }
    return 0;
}