computer fan

I have two used like new iPad dark grey 32 gb 7 gen Dark grey basically brand new never used I have two 175$ and free shipping works perfectly (price is only for one not both)

CRJ DC 12v Power Supply: https://www.amazon.com/CRJ-Power-Supply-4-Pin-Computer/dp/B071FNN9W7/ I have several fans left over from old PC builds. Most are Noctua, NZXT, and a several Corsair. I also have more than enough extensions and splits. but I'm not sure how many fans I can chain to...