This application is for academic demo purposes only, namely the course "Software Engineering II" @AAU. The requirements specify that it shall be possible to calculate a division.
The application implements the Passive View (aka. Model-View-Presenter), but since there is no Model class, I'd prefer Fowler's name.
The Divide button is deactivated as long as dividend and divisor are not specified, but will be activated as soon as both values are set. The output fields are hidden at the beginning, but are filled, after the Divide button was pressed.
NOTE: Since division by zero is not allowed from mathematical point of view, an appropriate error message is displayed.