Hi TF, If you just save the page to your desktop, it should be runnable from there. Since I have a windows PC at the moment, I would right-click and select View Source. I would then save the view source (using Save AS selection) on my desktop as calculator.htm
This would put the page on your desktop and it should work with a double-click. The ads will be missing and maybe some graphics but, it should work for you, since the page is fairly basic, without internet.
RT