Thanks for this submission and the comments you left on your solution. I failed this one as I just couldn't get a solution that would work fast enough. I unlocked the solutions only to see code here that I've already tried (the obvious being modular division) but it still wouldn't process fast enough for me. What gives?

Wow, great job! This is definitely not a 6kyu problem anymore. That's an awesome solution you have.

I was able to get this to work with the nines approach as well. Straight math and char parsing both failed the time limit.

This seems to generate a StackOverflow in VS for more than 5 digits.