At the pet store, there are 7 puppies and 6 kittens for sale. Two puppies and three kittens are sold. How many pets remain at the store?
There are 7 + 6 = 
<gadget id="calculator">7+6</gadget>
<output>13</output>
13 pets.
They sell 2 + 3 = 
<gadget id="calculator">2+3</gadget>
<output>5</output>
5 pets.
After the sales, there are 13 - 5 = 
<gadget id="calculator">13-5</gadget>
<output>8</output>
8 pets.

<result>8</result>