# Calculator

## Description

Calculator allows the telephone to be used as a basic four function calculator by using the telephone keypad, display, and softkeys.

## Conditions and Feature Interactions

Calculator is only available on some phones; see Feature Availability below for more information.

## Programming

This feature does not require programming.

## Device Support

- Supported on all devices.

## Operation

#### 5140 IP and 5240 IP Phones

To use the calculator:

- Press Settings.

- Press Calculator.

- Use the telephone keypad as the numeric keypad.
  The * key is used as the decimal point key.
  The following operations are presented as softkeys: Clear Entry/Clear ( CE/CLR), x, -, ¸, +/=, and another decimal point.