Linlin tied a lamb to the grass with a rope 10 meters long. What is the maximum area of grass that the lamb can eat?
琳琳用一根长10米的绳子把一只小羊栓在草地上，这只小羊能吃到的草的面积最大是多少平方米？
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<result>314</result>