Yep, I see the tutorial is not clear, will change it. Anyhow what you need to do is simply select line 35-45 with your cursor, then press Alt+Enter. And then,

Yep, I see the tutorial is not clear, will change it. Anyhow what you need to do is simply select line 35-45 with your cursor, then press Alt+Enter. And then, after that, execute MyMath.Fibonacci(12);