#include <stdio.h>
#include<math.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main()
{
    int x;
    float c,s,a,b;
    scanf("%d",x);
    c=2*x*M_PI;
    s=M_PI*x*x;
    a=tan(x);
    b=1/tan(x);

    printf("%f,%f,%f,%f\n",c,s,a,b);
   
   
    return 0;
}