Do you have a Mac?
Have you ever launched Calculator, Numbers, or Excel on it?
I don’t care why you didn’t already buy Soulver after years of me yelling at you to buy it. Just buy it now.
Every time you’d reach for Calculator for quick math or create a small spreadsheet to play with some variables, go to Soulver instead. I can’t possibly express how useful this is. If Soulver’s not running, I’m not working.