There are 13 chickens and crabs in the same cage with 44 legs, how many chickens are there?
鸡和螃蟹同笼，共13只，共44条腿，则鸡有多少只．
<gadget id="calculator">13 * 8</gadget>
<output>104</output>

<gadget id="calculator">104 - 44</gadget>
<output>60</output>

<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">60 / 6</gadget>
<output>10</output>

<result>10</result>