Ancients could build complex mechanical devices https://en.wikipedia.org/wiki/Antikythera_mechanism maybe the technology was even older.

Well, that is much less ancient, and from a different part of the world.

Are you suggesting a CNC mill was involved?

What's your point? Neither the article nor anybody here mentioned chisels...

I'm not sure I get your point.

How does one cut and move granite blocks with a calculator?