To open and use the Calculator
From the Home screen, tap the Apps Key
> Calculator 
.Basic Panel
QSlide Icon
Tap here to display the Calculator in QSlide format.
History Key
Tap here to view your past calculations.
Advanced Panel
Enter numbers and arithmetic operators on the Basic panel.
Drag the Basic panel to the left to open the Advanced panel, then drag to the right to go back to the Basic panel.
When a calculation is displayed, you can touch and hold the Calculator’s display to open a Context menu where you can copy (or cut) what you’ve entered to use it in other tools that you access.
Tap the Clear Key
to delete the last number
or operator you entered. Touch and hold the Clear Key to delete all of
the entered information.NOTEOnce a calculation is completed, the Clear Key changes from
that deletes individual
digits to 
which clears
the displayed calculation.Tap the History Key
to view your calculator
history. You can tap an entry to automatically reenter it on the display
to recalculate it, or edit it.Tap (or press) the Menu Key
to open an Options menu
to clear your calculation(s) history or change panels between Advanced
and Basic.Tap the QSlide icon
in the upper left corner to display the calculator panel
using QSlide.