A cat has nine lives.  A dog has 3 less lives than a cat.  A mouse has 7 more lives than a dog.  How many lives does a mouse have?
Dog:9-3=
<gadget id="calculator">9-3</gadget>
<output>6</output>
6 lives.
Mouse:6+7=
<gadget id="calculator">6+7</gadget>
<output>13</output>
13 lives.

<result>13</result>