Is there a must-have desktop calculator for trading?

I can do 4x4 multiplication faster than you can hit the keys.

 

Can you do 6 X 17? Trump and his kids weren't able to do it on the Howard Stern show.

 

Yeah, apparently they didn't teach that shortcut at Fordham.

 

I did it in seconds however there was no pressure. I have problems doing quick math in my head while in a group (distraction). I KNOW I couldn't do it while on a live radio show.

 

That rug matches this table very well
https://www.wayfair.co.uk/furniture/pdp/lily-manor-console-table-chtc1125.html

 

Not sure if this is what you're looking for, but I have used a calculator app that opens from the taskbar on my home PC for some time. It has several options and includes multiple types of calculators and also has converters; I use the scientific calculator option most of the time.

It's downloadable from Microsoft and can be resized and moved around anywhere on the displays after it opens.

 

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NOT really must have, but IBD...... recommended but helps; Stock Trader's Almanac. I use 2001, ...........2019]