Mortgages are not simple mathematical operations. Don’t betray your ignorance of modern finance. What the other guy gave you was a simple calculation of a mortg

Mortgages are not simple mathematical operations. Don’t betray your ignorance of modern finance. What the other guy gave you was a simple calculation of a mortgage rate. Actual financial modeling (which is done day in and day out and uses more compute cycles than you can imagine) cannot be done by reducing it to 4 operations. If you think modern mortgages are what the Babylonians worked with, you might as well call a computer a clay tablet. > paid anything in fractions of a penny? Yes. Fx operations routinely require sub penny operations. You’re claiming, as someone on a moderately technical (if heavily ignorant) forum, that you’re going to divorce your system for settling with mom and pop outfits who deal with nothing less than a penny - from the system that the same bank may need to use to run highly advanced operations (on the settlement layer)? If so, I don’t know what to tell you except ask you to understand how money works. You cannot stumble by on low end systems. There are incredibly complicated operations a bank does every single day in volumes of thousands that are not “complicated derivatives” which require much much more than the 4 basic operators. If finance was that fucking easy, any moron could do it. I’m not saying it is particularly difficult but you seem to think finance is accounting. It is not. It is almost anything but accounting. You’re still missing the point. Sure in storage it may make sense to cut it off at 2 decimals. But you seem to have a bad understanding of financial math in general where you think most of the operations are just the 4 basic operators. While it is strictly true, this is like saying most coding it just loops, so we can destroy the rest of the scaffolding and just put loops everywhere. No need for abstractions. That just sounds ignorant.