Hartley has 4 puppies that each weigh 7.5 kilograms. The rescue center has 14 cats that each weigh 2.5 kilograms. How many kilograms more do the cats weigh than the puppies?
Puppies = 4 * 7.5 = 
<gadget id="calculator">4*7.5</gadget>
<output>30</output>
30 kg.
Cats = 14 * 2.5 = 
<gadget id="calculator">14*2.5</gadget>
<output>35</output>
35 kg
35 - 30 = 
<gadget id="calculator">35-30</gadget>
<output>5</output>
5.
The cats weigh 5 kg more than the puppies.

<result>5</result>