There are 47 chickens and rabbits in the same cage and 100 legs. How many chickens are there?
鸡兔同笼共47只，脚有100只，鸡有多少只？
<gadget id="calculator">47 * 4</gadget>
<output>188</output>

<gadget id="calculator">188 - 100</gadget>
<output>88</output>

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

<gadget id="calculator">88 / 2</gadget>
<output>44</output>

<result>44</result>