There are 120 crayons in a box.  One third of the crayons are new, 20% are broken, and the rest are slightly used.  How many are slightly used?
New:120/3=
<gadget id="calculator">120/3</gadget>
<output>40</output>
40 crayons.
Broken:120(.20)=24 crayons.
Slightly Used:120-40-24=
<gadget id="calculator">120-40-24</gadget>
<output>56</output>
56 crayons.

<result>56</result>