This is a cute problem, a relatively easy one, from Brilliant.org. For those of you who have stopped sharing the puzzles with children, might be a good idea to share this one, I think most kids can do this with some trial and error.
Each letter is a unique digit, and L is 0 (zero)
Find all the letters.
As always, please send your answers as comments within the blog (preferred), or send an e-mail to firstname.lastname@example.org. Please do share the puzzle with others if you like, and please also send puzzles that you have come across that you think I can share in this blog.