Humans tend to see patterns where there actually are none.
There are so many mystical claims made by this man, you really need to let us know what we should be trying to debunk. Because I have no idea how this math supports his preposterous conclusions.
The fact that all multiples of 3 or 9 can be reduced to a single digit multiple of three in base 10 proves what, exactly? That the world is secretly run by Masons? That faster than light travel is possible? That the name of God can be found by drawing lines inside a circle?
I'm not being facetious. I really want to know how you make the leap from a few fancy number tricks (limited to base 10) to a secret code that underpins the universe.