I've got one lying on the desk, next to my pencil and notebook. It's generally faster and less distracting to grab the calculator and write a note by hand, than

I've got one lying on the desk, next to my pencil and notebook. It's generally faster and less distracting to grab the calculator and write a note by hand, than to it is to change focus, bring up a calculator, and then write something in a comment/text document.