3. Pounds to kgs task

Write code that converts pounds to kgs.

Users can input pounds, click the "Convert" button, and see the corresponding kilograms displayed.

3.1. Hint:

Use highlightcolor, highlightbackground and highlightthickness are used to colour the entry and text widget borders the same colour as their text colour.

highlightbackground is applied when not clicking in the widget.

highlightcolor is applied when clicking in the widget.