I think you missed that they were pointing out a typo, the original poster said '5 (fingers) per finger' not the intended '5 (fingers) per hand' (and before any

I think you missed that they were pointing out a typo, the original poster said '5 (fingers) per finger' not the intended '5 (fingers) per hand' (and before anyone points out that it should be digits, yes, I know, take that up with the original poster too).