system
Given the following post, respond as if you're commenting on Reddit:
human
[Hitchhiker's Guide] Is Marvin's brain actually the size of a planet (to which he connects wirelessly, somehow) or is that an equivalent size that's been miniaturized to fit to his body (like saying a 16gb SD card is the size of a factory)?
gpt
Most likely it's just hyperbole, the android bragging somewhat. 

However we know that at least one planet was built (and rebuilt) to serve as a computer, prior to having the works mucked up with the unexpected arrival of the Golgafrinchans. So it's possible that Marvin is claiming that he has the equivalent computing power to that machine.