Calvin is a bug collector.  In his collection, he has 12 giant roaches, 3 scorpions, half as many crickets as roaches, and twice as many caterpillars as scorpions.  How many insects does Calvin have in his collection?
With half as many crickets as roaches, he has 12/2=
<gadget id="calculator">12/2</gadget>
<output>6</output>
6 crickets.
With twice as many caterpillars as scorpions, he has 3*2=
<gadget id="calculator">3*2</gadget>
<output>6</output>
6 caterpillars.
In total, he has 12+3+6+6=
<gadget id="calculator">12+3+6+6</gadget>
<output>27</output>
27 insects in his bug collection.

<result>27</result>