Uncle Wang plans to use a 400-meter-long fence to enclose a rectangular chicken farm. If the length is 30.8 meters larger than the width, how many square meters is the chicken farm?
王大爷准备用400米长的栅栏围一个长方形养鸡场，如果长比宽多30.8米，这个养鸡场面积是多少平方米？
<gadget id="calculator">30.8 * 2</gadget>
<output>61.6</output>

<gadget id="calculator">400 - 61.6</gadget>
<output>338.4</output>

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

<gadget id="calculator">338.4 / 4</gadget>
<output>84.6</output>

<gadget id="calculator">84.6 + 30.8</gadget>
<output>115.4</output>

<gadget id="calculator">115.4 * 84.6</gadget>
<output>9_762.84</output>

<result>9_762.84</result>