Nokia 9290 - Manual (Page 247)

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Extras
Calculator
There are two modes in Calculator: desk calculator for simple arithmetic operations
and scientific calculator for more complicated mathematical calculations.
There are two ways to perform calculations, either by typing the characters in the
input field or selecting symbols from the function map. A calculation is executed
by pressing Enter or =.
The calculation and its result can be seen on the output sheet on the left. You cannot
write in the output sheet, but selection is possible.
Figure 99
To move between the input field, output sheet, and function map, press the Tab key.
The input field is never empty in the desktop calculator: it contains either the result
of the previous calculation or a zero (0) if you have pressed backspace.
Note: For more detailed information about Calculator, see the Nokia 9290
Communicator help.