624.10 Extra4.10.1 CalculatorYour mobile phone provides a calculator with 4 basicfunctions to facilitate simple calculations.Enter the “Calculator” submenu to display the operationinterface of the calculator: Use the Number keys from 0 to 9 to enter thenumbers you wish to enter. Press the right soft key, you can delete the latestentry or result, press the right soft key, “BACK”, toexit the calculator, press the left soft key, “ok” tocalculate the result.!Tip: The precision of this calculator is limited so thatrounding errors may occur, especially in the case ofindivisibility.4.10.2 StopwatchYou can USB Typical stopwatch or N Way stopwatch.