Delores has $450. She buys a computer for $400 and a printer for $40. How much money, in dollars, does Delores have left?
The computer and printer cost 400+40=
<gadget id="calculator">400+40</gadget>
<output>440</output>
440 dollars.
Delores has 450-440=
<gadget id="calculator">450-440</gadget>
<output>10</output>
10 dollars left.

<result>10</result>