John goes to the store to buy Slurpees and gives them $20.  Slurpees cost $2 each and he got $8 in change.  How many Slurpees did he buy?
He spent 20-8=$
<gadget id="calculator">20-8</gadget>
<output>12</output>
12 on Slurpees.
So he got 12/2=
<gadget id="calculator">12/2</gadget>
<output>6</output>
6 Slurpees.

<result>6</result>