#include #include #include<math.h> using namespace std; int main(){ double r,d,c,s; cin>>r; d=r2; c=d3.14159; s=rr3.14159; cout<<fixed<<setprecision(4)<<d<<" "; cout<<fixed<<setprecision(4)<<c<<" "; cout<<fixed<<setprecision(4)<<s; }