Agatha has $60 to spend on a new bike. She spends $15 on the frame, and $25 on the front wheel. What does she have left, in dollars, to spend on a seat and handlebar tape?
Agatha spends 15+25=
<gadget id="calculator">15+25</gadget>
<output>40</output>
40 dollars.
Agatha has 60-40=
<gadget id="calculator">60-40</gadget>
<output>20</output>
20 dollars left.

<result>20</result>