#include<stdio.h>
double c,in,out,a;
int main()
{
	scanf("%lf %lf %lf",&c,&in,&out);
	a=3.14159265358979323*3.14159265358979323*(in+out)*(out-in)*(out-in)/4;
	printf("%lf\n",c);
	printf("%lf\n",a);
	printf("%.10lf\n",c*a);
	return 0;
}