anonymous
Web2.0calc is good and easy to integrate.
Code:
<iframe width="590" height="390" src="http://web2.0calc.com/widgets/horizontal/" scrolling="no" style="border: 1px solid #silver; "> 
</iframe>
<br />
<a href="http://web2.0calc.com/">Web 2.0 scientific calculator</a>
posted by <hidden> • 2 years and 9 months ago Link