Sally bought 3 photograph frames, each costing her $3. She paid with a $20 bill. How much change did she get?
She bought the frames for 3 * $3 = $
<gadget id="calculator">3*3</gadget>
<output>9</output>
9.
Sally got $20 - $9 = $
<gadget id="calculator">20-9</gadget>
<output>11</output>
11 in change.

<result>11</result>