There are 8 chickens and rabbits with 22 legs. How many chickens are there?
鸡和兔一共有8只，它们的腿有22条．鸡有多少只．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">32 - 22</gadget>
<output>10</output>

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

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>