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Note: This calculator has limited accuracy and is designed for simple calculations.
Select Menu > Organiser > Calculator. When 0 is displayed on the 
screen, enter the first number in the calculation, press the # key for a decimal 
point. Select Options >Add, Subtract, Multiply, Divide, Square, Square root, or 
Change sign. Enter the second number. For a total, select Equals. As many times 
as it is necessary, select Options and the option again. To start a new calculation, 
first select and hold Clear.
Performing a currency conversion
Select Menu > Organiser > Calculator. To save the exchange rate, select 
Options > Exchange rate. Select either of the displayed options. Enter the 
exchange rate, press the # key for a decimal point, and select OK. The exchange 
rate remains in the memory until you replace it with another one. To perform the 
currency conversion, enter the amount to be converted, select Options > In 
domestic, or In foreign.
Countdown timer
Select Menu > Organiser > Countdown timer. Enter the alarm time in hours, 
minutes, and seconds, and select OK. If you wish, write your own note text that is 
displayed when the time expires. To start the countdown timer, select Start. To 
change the countdown time, select Change time. To stop the timer, select Stop 
timer.
If the alarm time is reached when the phone is in the standby mode, the phone 
sounds a tone and flashes the note text if it is set or Countdown time up. Stop the 
alarm by pressing any key. If no key is pressed, the alarm automatically stops