Would it not also depend on how they respond to stimuli?

I know you wouldn’t multiply exponents that way unless it’s an exponent of an exponent. In any case, it’s the only way I can make the term “mcg” actually make sense.
Think of it as giving someone the benefit of the doubt to the point of absurdity.

Micrograms? You mean millicentigrams, commonly abbreviated as mcg by people who avoid proper SI- symbols?

Since milli means 1/10^3 and centi means 1/10^2, I propose millicenti means 1/10^(3*2) or 1/10^6.

Or the extended keycode-averse could just use ug.

I have no experience in this specific matter, but you could look up how to switch the sector size from 512 bytes to 4096 and, you know, just do the opposite.