What was your motivation for making this? I see that you mention that it was a learning project but it seems like a specific enough tool that it is potentially solving some real-world problem for you.
You are right! I'm a student and my problem was some Supply Chain and Lean Management homeworks:
I needed to process computations on tables of numbers but my teacher didn't had the data, only screenshots of those tables, so I spent a long time copying numbers into Excel until I decided to implement this. :-)