Tom’s cat is 8 years old.  His rabbit is half the age of his cat.  His dog is three times as old as his rabbit.  How old is the dog?
Tom's rabbit is 8 / 2 = 
<gadget id="calculator">8/2</gadget>
<output>4</output>
4 years old.
His dog is 4 x 3 = 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 years old.

<result>12</result>