Nokia 6820 User Guide 73 Copyright © Nokia 2004ApplicationsCalculatorThe calculator in your phone adds, subtracts, multiplies, divides, calculates the square andthe square root, and converts currency values.1 Select Menu > Applications > Extras > Calculator.2 When “0” appears on the screen, key in the first number of the calculation, press the# key for a decimal point or the corresponding symbol on the keyboard, if the keyboardis open.3 Select Options > Add, Subtract, Multiply, Divide, Square, Square root or Change sign.If the keyboard is open, you can also use the corresponding calculation symbols of thekeyboard, if available.Note: If you are using the calculator with the keyboard closed, press the * keyonce to add, twice to subtract, three times to multiply, or four times to divide.4 Key in the second number.5 For the total, select Equals.6 To start a new calculation, press and hold Clear.Note: This calculator has a limited accuracy and is designed for simplecalculations.Currency conversion1 Select Menu > Applications > Extras > Calculator.2 To save the exchange rate, select Options > Exchange rate.3 Select either of the displayed options.4 Key in 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.5 To perform the currency conversion, key in the amount to be converted, selectOptions > In domestic or In foreign.You can also perform the currency conversion in the standby mode. Key in the amount tobe converted, select Options > In domestic or In foreign.Note: When you change base currency, you must key in the new rates because allpreviously set exchange rates are set to zero.Countdown timerSelect Menu > Applications > Extras > Countdown timer. Key in the time in hours andminutes and select OK. If you wish, write a note that will be displayed when the timeexpires, and select OK to start the countdown timer.To change the countdown time, select Change time, or to stop the timer, select Stop timer.