6 x 6 x 6= 216.
That is pure math.
They could have named these implanted microchips anything, but THEY chose 216.
https://dangerousthings.com/shop/xnti/
Here is a video providing a lot more information on this scary "technology:"
This is NOT NECESSARY unless you are looking for total control over every person, and looking for ways to lock OUT people who do not want to be chipped. DO NOT BE FOOLED BY THE PROPAGANDA.
If you accept this you are doomed:
http://www.markbeast.com/mark/get-mark-beast.htm
Take it seriously.
God is not mocked.