In the class of 24 students, half are doing silent reading, and a third are playing board games. The rest are catching up on homework. How many students are catching up on homework?
24/2=
<gadget id="calculator">24/2</gadget>
<output>12</output>
12 students are doing silent reading.
24/3=
<gadget id="calculator">24/3</gadget>
<output>8</output>
8 students are playing board games.
So 12+8=
<gadget id="calculator">12+8</gadget>
<output>20</output>
20 students are accounted for.
Then 24-20=
<gadget id="calculator">24-20</gadget>
<output>4</output>
4 students are catching up on homework.

<result>4</result>