noun
calculator
KAL-kyuh-lay-ter/ˈkælkjuleɪtər/
A device or program that performs mathematical calculations.
The handheld calculator has a numeric keypad below its display.

Etymology
A calculator was originally a person who reckoned—a mathematician or someone doing calculations. The name later transferred to machines that performed arithmetic, giving the modern device its human job title.
In context
without using any calculator you can divide 72 by that rate and you will get the time period in number of years
More examples
- The phone's calculator converted the measurements.
- He checked the result with a calculator.
- The exam allowed basic calculators but no programmable devices.
Forms
calculator · calculators
Similar words
- computer
- A general-purpose information-processing device, while a calculator focuses on mathematical operations.