Asus G73JHBST7 Manual page 47

Extended Keyboard (on selected models)
An extended keyboard is available on selected models. The
extended keyboard has a dedicated numeric keypad for easy
number entry. Use [Num Lk / Scr Lk] to toggle between using the
extended keypad as numbers or as pointer directions. The pointer
direction keys are for navigation between fields or cells such as
those in a spreadsheet or table.
Notebook PC User Manual 47