Product of two complex numbers

This page is a simple example of using two JavaSketchpad applets together.
You here you have two JSP applets and one applet with a "Connect" button. After both JSPs have been loaded, you can connect them together by pressing the button.
In the left JSP you see an complex number c and in the right you see complex numbers z and c*z (z multiplied with c). When you drag c or z the product changes (if you have pressed the "Connect" button).