Calc recommendation - self-study college math refresh

[rprosperi]

(08-26-2024 03:40 AM)HPing Wrote:  Stuffing a piece of rubber in the back via the battery compartment fixed the keys. Can't get the door back on so will have to sort that later on.

Thanks for confirming this seemingly easy fix, but could you (or someone that has successfully used this repair technique) please post a photo showing exactly where the piece of rubber is inserted?