Bart makes a mixtape.  The first side has 6 songs.  The second side has 4 songs.  Each song is 4 minutes.  How long is the total tape?
There are 6+4=
<gadget id="calculator">6+4</gadget>
<output>10</output>
10 songs on the tape.
In total, the time is 10*4=
<gadget id="calculator">10*4</gadget>
<output>40</output>
40 minutes.

<result>40</result>