20 kids in preschool are ready for a nap.  1/2 of the kids fall asleep within the first 5 minutes.  Then half of the kids remaining fall asleep within another 5 minutes.  How many kids are still awake?
In a class with 20 kids, 1/2 of the students have already fallen asleep so 20/2 = 
<gadget id="calculator">20/2</gadget>
<output>10</output>
10 kids are already asleep.
We start with 20 kids awake and 10 are already asleep so 20- 10 = 
<gadget id="calculator">20-10</gadget>
<output>10</output>
10 kids are still awake
1/2 of these 10 kids fall asleep next meaning there are 10/2 = 
<gadget id="calculator">10/2</gadget>
<output>5</output>
5 students still awake.

<result>5</result>