Violetta wants to buy new crayons. She needs them in 5 different colors and prepared $20 for this purchase. One crayon costs $2. How much change will she get?
Violetta is going to pay 5 * 2 = $
<gadget id="calculator">5*2</gadget>
<output>10</output>
10 for the crayons she wants.
If she pays $20, she will get 20 - 10 = $
<gadget id="calculator">20-10</gadget>
<output>10</output>
10 of change.

<result>10</result>