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#include<bits/stdc++.h>
using namespace std;
int main(){
double r,a=0,b=0,c=0;
cin >>r;
a=r2;
b=23.14159r;
c=3.14159(r*r);
printf("%.4lf ",a);
printf("%.4lf ",b);
printf("%.4lf ",c);
return 0;
}