There are 20 more chickens than rabbits, and a total of 100 legs. How many chickens are there? what is the correct answer
鸡比兔多20只，共有100只脚，鸡有多少只？正确答案是多少
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<gadget id="calculator">2 + 4</gadget>
<output>6</output>

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

<gadget id="calculator">10 + 20</gadget>
<output>30</output>

<result>30</result>