Multifunctional simple calculator

RCalcul: a set of beauty and talent in a calculation artifact

【detail】
- Buttons with sound
- With dynamic text
- Screen simple and practical

【use】
- Support bracket operation, in line with normal human arithmetic logic
- Support for calculation browsing, you can enter at any time if there is an error
- Support Chinese Arabic digital readout method, so you results at a glance
- Support for editing copy, in view of the results where the right slide to enter the edit page
- Support for popular length, area and other units conversion, click on the top right of the toggle button to enter