Desktop Calculator play online

This app is designed to look and operate exactly like a real desktop
calculator.
This calculator performs the same function as the Casio calculator.

Main Features:
- 12-digits
- Constant calculation mode
- Percentages
- Memory keys
- Grand Total (GT) key
- Square root
- Setting Numeric Display formats
- Decimal Positions
- Result history
- Copy & Paste support
- Undo & Redo support
- Landscape mode