There are 5 more rabbits than cats, and 20% fewer cats than rabbits. How many cats are there?
兔子比猫多5只，猫比兔子少20%，猫有多少只．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 / (1/5)</gadget>
<output>25</output>

<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<result>20</result>