>>464
#include<stdio.h>
#define pi 3.14159
void kyu(double r){
printf("S1 = %f\n",pi*r*r);
printf("S2 = %f\n",4*pi*r*r);
}
int main(void){
double r;
while(1){
scanf("%lf",&r);
if(r==0.0)break;
kyu(r);
}
return 0;
}