LG ESTEEM Owner's Manual page 152

Tools
150
Calculator
Allows you to perform simple mathematical calculations.
To open and use the Calculator
Touch the Applications Key
Enter numbers and arithmetic operators on the Basic panel.
Drag the Basic panel to the left to open the Advanced panel.
Touch and hold the Calculator's display to open a menu where you can
copy what you've entered and access other tools.
Touch Clear to delete the last number or operator you entered. Touch
and hold Clear to delete all of the entered information.
> Calculator .