KODU:
<!-- ONE STEP TO INSTALL BASIC CALCULATOR:
1.  Paste the coding into the BODY of your HTML document  --><!--  STEP ONE: Copy this code into the BODY of your HTML document  --><center>
<form name="Calc">
<!-- This script and many more are available free online at --><!-- The JavaScript Source!! http://javascript.internet.com -->
<table border="4">
<tbody>
<tr>
<td><input size="16" name="Input" type="text" /></td>
</tr>
<tr>
<td><input onclick="Calc.Input.value += '1'" type="button" name="one" value="  1  " /> <input onclick="Calc.Input.value += '2'" type="button" name="two" value="  2  " /> <input onclick="Calc.Input.value += '3'" type="button" name="three" value="  3  " /> <input onclick="Calc.Input.value += ' + '" type="button" name="plus" value="  +  " /> <br />
<input onclick="Calc.Input.value += '4'" type="button" name="four" value="  4  " /> <input onclick="Calc.Input.value += '5'" type="button" name="five" value="  5  " /> <input onclick="Calc.Input.value += '6'" type="button" name="six" value="  6  " /> <input onclick="Calc.Input.value += ' - '" type="button" name="minus" value="  -  " /> <br />
<input onclick="Calc.Input.value += '7'" type="button" name="seven" value="  7  " /> <input onclick="Calc.Input.value += '8'" type="button" name="eight" value="  8  " /> <input onclick="Calc.Input.value += '9'" type="button" name="nine" value="  9  " /> <input onclick="Calc.Input.value += ' * '" type="button" name="times" value="  x  " /> <br />
<input onclick="Calc.Input.value = ''" type="button" name="clear" value="  c  " /> <input onclick="Calc.Input.value += '0'" type="button" name="zero" value="  0  " /> <input onclick="Calc.Input.value = eval(Calc.Input.value)" type="button" name="DoIt" value="  =  " /> <input onclick="Calc.Input.value += ' / '" type="button" name="div" value="  /  " /></td>
</tr>
</tbody>
</table>
</form>
</center>
<p>&nbsp;</p>
<center><a href="http://www.htmleditorx.tr.gg">www.htmleditorx.tr.gg</a></center>
<p><!-- Script Size:  1.89 KB  --></p>