This is a secreensaver with some calculators. Copy the downloaded file to your WINDOWS\SYSTEM32 folder (Windows XP users) or into your WINDOWS\SYSTEM folder (Windows 98 or ME users). Right click on the desktop and choose "Properties". Click on the "Screen Saver" tab, highlight your chosen screensaver and click "OK".
It is freeware that comes without any warranty or support. Thus you use it at your own risk.
Download Ver. 4.4