#include<stdio.h>

#define PI 3.141592653

#define TWOPI (PI+PI)
//const double TWOPI = PI+PI;

int main(){
	printf("%lf\n", PI);

	printf("%lf\n", TWOPI);

	printf("%lf\n", 2 * TWOPI);
	printf("%lf\n", (((2))) * ((PI)+(PI)));


	return 0;
}