Hidden lunch

What delicious lunch hides in the equation

\displaystyle \pi=\left(\frac{n_{om}}{z\sqrt{a}}\right)^2?

Rearrange the equation to find out!

Scroll down for solution.

…some more.

Let’s see. Applying squares:

\displaystyle \pi=\frac{n^2_{om}}{z^2a},

Isolating n_{om},

\displaystyle n^2_{om}=\pi z^2 a.

(If you didn’t get it, check the hintanswer)

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