The maximum range of an automatic sprinkler is 12 meters, how many square meters is its sprinkler area at most?
一个自动喷灌装置的最大射程是12米，它的喷灌面积最多是多少平方米？
<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">3.14 * 144</gadget>
<output>452.16</output>

<result>452.16</result>