Sorry just overlooked.
First I see your attempt and logic. Seems fair on surface.
However:
1. You mean GBE not GPE of the moon before and after splitting right? Amend that first, thanks.
2. Like everyone to also glimpse on my calculation, which focus on splitting the moon into two halves but does not otherwise make the two move apart?
vsbattles.fandom.com
Like Migue's version will consider splitting a moon into two halves as if they are two specific celestial beings.
However my version will be a version (subject to expansion) for splitting a moon into two halves but the two halves do not split apart.
LSS
If the two halves move away, use Migue's version.
If not, use my version.
(You are right the Naruto one is specifically for the way Toneri cut and move the moons.)
How is the deal?