There are 8 chickens and rabbits, and there are 22 legs in total. How many rabbits are there?
鸡和兔一共有8只，数一数腿共有22条，其中兔有多少只．
<gadget id="calculator">2 * 8</gadget>
<output>16</output>

<gadget id="calculator">22 - 16</gadget>
<output>6</output>

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

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>