#include <bits/stdc++.h>
#define PI acos(-1.0)
using namespace std;
 
int main() {
	cout << setprecision(10) << PI << endl;
	cout << setprecision(10) << PI*10 << endl;
	cout << setprecision(10) << PI*100 << endl;
	cout << setprecision(10) << PI*1000 << endl;
	cout << fixed << setprecision(10) << PI << endl;
	cout << fixed << setprecision(10) << PI*10 << endl;
	cout << fixed << setprecision(10) << PI*100 << endl;
	cout << fixed << setprecision(10) << PI*1000 << endl;
	return 0;
}

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