The most simple mathematical operations: addition, subtraction, multiplication, division. This is a simplified version of the online calculator.
The full version you can get and use here: https://calculator-1.com
For the work of the simple calculator You can use both ordinary numeric buttons above the keyboard and separate numeric buttons on the right.
You can use the [Enter] key to enter the equal character.
To delete the last character, press the [Backspace] (arrow) key.
To enter a plus sign, use the [ + ] key at the top or on the side numeric keypad.
To enter a minus sign, use the [ - ] key at the top or on the side numeric keypad.
Use the [ * ] key on the side numeric keypad to enter the multiplication sign.
Use the [ / ] key on the side numeric keypad to enter the division sign.
You can use the [Esc] and [Del] keys on top of the keyboard, or the [End] key on the side numeric keypad to reset the calculator.