"No problem", "the solution is simple", "there you have it", "It's that easy", "you have what you want", "all will be well; indicates a desirable conclusion has been reached.
voilà
intj
Lo, there it is; see here; ta-da; presto; behold!
How often have the words Bob's your uncle and voilà occurred in a corpus of books? (source: Google Ngram Viewer )