# Calculator

The **calculator** can be found in Magic Box's tools menu and is available in all versions of myViewBoard. Use the calculator to perform mathematical calculations during a math presentation.

This tool can be used on the canvas in **Present** and **Prepare** modes.

## Windows

### Add a calculator to the canvas

- On the main toolbar, press .
- In the Magic Box window, select .
- Double press (or press and drag the icon onto the canvas).
- The calculator will appear on the canvas.

### Actions available

**Icon**

**Operation**

**Description**

**Percent**

Returns a percent calculation of the number entered.

**Radical**

Calculates the root of the current entry.

**Square**

Returns the square of current entry.

**1/x**

1 divided by the current entry.

**CE**

Clears the last entry.

**C**

Clears the whole computation.

**Backspace**

Deletes only one digit.

**Divide**

Performs a division operation.

**Multiply**

Performs a multiplication operation.

**Minus**

Performs a subtraction operation.

**Plus**

Performs an addition operation.

**Equals**

Shows the calculation result.

**+/- sign**

Change arithmetic sign.

## Android & iOS

### Add a calculator to the canvas

- On the main toolbar, press .
- In the Magic Box window, select .
- Double press .
- The calculator will appear on the canvas.

### Actions available

**Icon**

**Operation**

**Description**

**Percent**

Returns a percent calculation of the number entered.

**Radical**

Calculates the root of the current entry.

**Square**

Returns the square of current entry.

**1/x**

1 divided by the current entry.

**CE**

Clears the last entry.

**C**

Clears the whole computation.

**Backspace**

Deletes only one digit.

**Divide**

Performs a division operation.

**Multiply**

Performs a multiplication operation.

**Minus**

Performs a subtraction operation.

**Plus**

Performs an addition operation.

**Equals**

Shows the calculation result.

**+/- sign**

Change arithmetic sign.