John goes to the bakery to buy rolls.  They sell them for 5 dollars for a dozen.  He spent 15 dollars.  How many rolls did he get?
He got 15/5=
<gadget id="calculator">15/5</gadget>
<output>3</output>
3 dozen.
So he bought 3*12=
<gadget id="calculator">3*12</gadget>
<output>36</output>
36 rolls.

<result>36</result>