Chickens are not in the same cage. Rabbits are 15 fewer than chickens. There are 282 legs in total. How many rabbits are there?
鸡免同笼，兔比鸡少15只，共有282只脚，兔有多少只．
<gadget id="calculator">2 * 15</gadget>
<output>30</output>

<gadget id="calculator">282 - 30</gadget>
<output>252</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<gadget id="calculator">252 / 6</gadget>
<output>42</output>

<result>42</result>