#include <bits/stdc++.h>
using namespace std;
int main()
{
int a;
float s,c,pi=3.1415926;
scanf("%d",&a);
s=pi*a*a;
c=pi*2*a;  
printf("%.2f %.2f",s,c);
return 0;
}

/**************************************************************
	Problem: 1005
	User: 666
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/