Jerry's Game (UVA 13056) by beet1333
Contest: 3738    RunID: 20174012    Status: Accepted    Date: Sat Oct 14 15:00:50 JST 2017


#include<bits/stdc++.h>

using namespace std;

using int64 = long long;

struct BeetAizu
{

  BeetAizu()
  {
  }

  void run()
  {
    double R, V;
    cin >> R >> V;
    cout << fixed << setprecision(10) << acos(-1) / V / 2 * R << endl;
  }
};

int main()
{
  BeetAizu beet;
  int T;
  cin >> T;
  for(int i = 1; i <= T; i++) {
    cout << "Case " << i << ": ";
    beet.run();
  }
}