There are 36 penguins sunbathing in the snow.  One-third of them jump in and swim in the ocean.  Another one-third go inside the cave to eat their dinner.  How many penguins are still left sunbathing?
This many penguins are swimming: 36/3 = 
<gadget id="calculator">36/3</gadget>
<output>12</output>
12 penguins.
This many penguins are eating their dinner: 36/3 = 
<gadget id="calculator">36/3</gadget>
<output>12</output>
12 penguins.
This many penguins are not sunbathing: 12 + 12 = 
<gadget id="calculator">12+12</gadget>
<output>24</output>
24.
This many penguins are still sunbathing: 36 - 24 = 
<gadget id="calculator">36-24</gadget>
<output>12</output>
12 penguins.

<result>12</result>