Yes, quite frequently. A cheap[1] Casio fx-85GT Plus - one kicking around my desk, the other in my laptop bag. I'm not doing anything mathematically sophisticat

Yes, quite frequently. A cheap[1] Casio fx-85GT Plus - one kicking around my desk, the other in my laptop bag. I'm not doing anything mathematically sophisticated, so usually it does everything I need and is so much easier than switching context to use my phone or an online calculator - and I appreciate the small element of physicality. Battery/solar so it lasts for ever, too. [1] £10ish from a supermarket. Lost one, bought another, then inevitably found the first one.