Not a lot for the price.
The app does what it says okay, however it gives you the answer in the form of randomly generated numbers that you pick the right one from rather than figuring it out yourself, which is what a real problem will have you do. And the price is quite steep to me for a one function app. Other apps, such as the ABTC calculator let you perform many functions, break down each step, and are much cheaper.
Aha86 about
Long Division, v2.3