There are 35 chickens and rabbits, and 94 feet in total. How many chickens are there?
鸡和兔共有35只，共有94只脚，则鸡有多少只．
<gadget id="calculator">35 * 2</gadget>
<output>70</output>

<gadget id="calculator">94 - 70</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">35 - 12</gadget>
<output>23</output>

<result>23</result>