What does 4E12 on a calculator mean?

Like this guitar is 2k? how much is a k?

im not from america but every time i watch an ad on youtube for a tv show on disney channel it always says somthing like...

It was on toby on pretty little liars and i dont know what it means!! i saw somewhere that it looked like an inmate numb...

or 911-0024. i know it spells something (the way people used to convert numbers into letters of the alphabet to send mes...

I’m her aunt and she started living with me. She says she doesn’t want anything for Christmas . But I’m going to get her...

please dont think im a ᴘᴇʀvᴇʀт im just curious if it looks different then an 18 or 19 year olds

im in a halfway house getting clean i get 18 panel drug test i was wondering what does it test for i know it is the basi...

And why would this be a bad thing to be????

I need 3 ways of what a Computer OS does (preferably Windows)Thanks