Click Start, All Programs, Accessories , and then click Calculator .
Click the buttons on the calculator to enter an equation.
You see the results of the calculation.
When you are finished, click the Close button.
INTRODUCTION
If you need to perform a quick calculation, use the Calculator program included with Windows XP. To use a more complex scientific calculator, click the calculator's View menu, and then click Scientific .
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Copy Results to Document
To copy the results of a calculation into a document, select the results, click Edit , and then choose Copy . Then move to the document where you want to paste the results, click Edit , and then choose Paste .
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Use the Keypad
To use the numeric keypad to enter numbers , press the Num Lock button on your keyboard. Then type the equation using these keys.