Chickens and rabbits are in the same cage, with 30 heads and 96 legs. How much is the difference between chickens and rabbits?
鸡兔同笼，有30个头，96条腿，鸡兔相差多少只？
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<gadget id="calculator">120 - 96</gadget>
<output>24</output>

<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">30 - 12</gadget>
<output>18</output>

<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<result>6</result>