A smartphone screen shows a calculator app interface including numbers and basic function buttons.
Schlüsselwörter
smartphone,
calculating machine,
application,
numeric,
worked,
device,
digital,
interface,
mathematic,
screen,
display,
tool,
technology,
buttons,
contraption,
number,
calculation,
icon,
touch screen,
portable,
mobile,
electronic,
handy,
pocket,
accessible
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