Why Does the Rotational Energy Formula Give Different Results for E(2+)?

[JD_PM]

Summary: I want to show by using the rotational energy formula that $E(2^+) = 92 KeV$? But I got $E(2^+) = 3096KeV$. Below is what I've done. There must be something I am missing.

[Moderator's note: Moved from a technical forum and thus no template.]

 

[JD_PM]

There's a flaw in this exercise. My result is correct.