I know i know, it sounds boring, but I had to learn it recently and realised it could have a few uses for some people in the future (particularly in the corporate world).
Enjoy!
And just in case you can't type properly here is the formula:
Math.round("Whatever the expression is")
and remember it starts with a capital M. Otherwise the expression won't work!
Also if you are looking to add commas to your number count check out this tutorial
https://www.youtube.com/watch?v=5WJmrYMifW8
آی-ویدئو