Congratulations to BlogKindle for this very cool Kindle DX find!
Turns out that the Kindle DX works as a calculator, complete with basic math as well as some commonly used trigonometric functions. Just type a formula (2+2, 2*2, 2-2, 2/2, etc.) as you would type any search term at the Home screen and the solution will appear on the top line of your Home display. Who knew? Well, BlogKindle did!
Don’t forget to use the ALT key to make the Kindle DX’s QWERTY keyboard’s top row render numbers.