Zoe had 6 songs on her mp3 player. If she deleted 3 old songs from it and then added 20 new songs, how many songs does she have on her mp3 player?
<gadget id="calculator">6 + 20</gadget>
<output>26</output>

<gadget id="calculator">26 - 3</gadget>
<output>23</output>

<result>23</result>