ZeroTier One device packs (professional plan)

Hello, I’d like to know what does a device pack mean?
Free plan says it gives me 25 devices where a professional plan gives me 25 device packs.
Following that logic, 25 devices mean 1 pack, so 1 device pack = 25 devices, that means 25 device packs are 625 devices? Am I getting this correctly?
Thanks in advance for your answers!