There are chickens and rabbits with the same number living together in a cage, and it is known that chicken legs are 18 fewer than rabbit legs. Question: How many chickens and rabbits are famous?
现有数量相同的鸡兔共居一笼，已知鸡腿比兔腿少18条．问：鸡和兔各有名少只？
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>