Susan has 21 cats and Bob has 3 cats. If Susan gives Robert 4 of her cats, how many more cats does Susan have than Bob?
After giving away four of her cats, Susan has 21 - 4 = 
<gadget id="calculator">21-4</gadget>
<output>17</output>
17.
Susan has 17 - 3 = 
<gadget id="calculator">17-3</gadget>
<output>14</output>
14 more cats than Bob.

<result>14</result>