#include double c,in,out,a; int main() { scanf("%lf %lf %lf",&c,&in,&out); a=3.14159265358979323846*3.14159265358979323846*(in+out)*(out-in)*(out-in)/4; printf("%lf\n",c); printf("%lf\n",a); printf("%.10lf\n",c*a); return 0; }