Paige had 11 songs on her mp3 player. If she deleted 9 old songs from it and then added 8 new songs, how many songs does she have on her mp3 player?
<gadget id="calculator">11 + 8</gadget>
<output>19</output>

<gadget id="calculator">19 - 9</gadget>
<output>10</output>

<result>10</result>