- Design
- Background image
- Colors
- +, -, *, /, dot -- 5
- Numbers - 0 to 9 -- 10
- Function Button
- AC - all clear
- x - backspace
- = - result
- Total 18 cell is needed
- 5 X 4 grid design
- 3 rows for display result
- Multiple decimal point is being added. How to fix this?