#include <stdio.h>

int main(void) 
{
float d=20,r,pai=3.14,menseki,v,s;
r=d/2;
menseki=pai*r*r;
v=4*pai*r*r*r/3; 
s=4*pai*r*r;    
printf("%f,%f,%f",menseki,v,s);
return 0;
}