Surface computing Calculator and Currency convertor desktop gadget with 360° UI. You can freely rotate and scale the calculator. Move mouse over one of the gadget corners to reveal the scaling and rotation controls. Calculator can run in background in your system-tray by pressing the Windows_Key+F2. You can also adjust level of gadget transparency. Whole gadget is one single exe file. You don't have to install it, just put it on the desktop or to the windows start-up folder. Enjoy.