<div class="notebook">

<div class="nb-cell program" name="p1">
pricingwithgst(Price, GST, EXGST) :- GST is Price / 11, EXGST is Price - GST.
</div>

<div class="nb-cell query" name="q1">
pricingwithgst(110, GST, EXGST).
</div>

<div class="nb-cell query" name="q2">
pricingwithgst(Price, GST, 100).
</div>

<div class="nb-cell program" data-background="true" name="p2">
pricingwithgst2(Price, GST, EXGST) :- ground(Price), GST is Price / 11, EXGST is Price - GST.
pricingwithgst2(Price, GST, EXGST) :- ground(EXGST), GST is EXGST / 10, Price is EXGST + GST.
</div>

<div class="nb-cell query" name="q3">
pricingwithgst2(110, GST, EXGST).
</div>

<div class="nb-cell query" name="q4">
pricingwithgst2(Price, GST, 100).
</div>

</div>