Javascript Division/Multiplication

Question

Can anyone help explain why the division and multiplication functions wont work. This is my first time messing around with js arithmetic but surely im just missing something obvious.
https://code.sololearn.com/W1Pv8CTd79y8/?ref=app

Answer 1

<button id="divbtn" onclick="div">Division
</button>

you are not calling the functions
add () to div and mul

Answer 2

ahhh.....always the last place you look.....

Answer 3

THANK YOU! @ Burey, i knew it was something simple i missed.