ماشین حساب کلاسیک

Classic Calculator v1.5:
- Adds build number in configuration screen
- Added mathematical priority of operations
- Added parenthesis function
- Corrections in percentages of operations
- Many corrections and improvements in exponent and rounding.
- Added operations with Constants
- Improvement in stacked memory calculation
- Some changes in the appearance of the menu
- Add new model: Dragon
- Updates Google APIs to improve compatibility with new Android versions