The range of an automatic rotary sprinkler irrigation device is 8 meters. What is the maximum area of land that it can irrigate?
一种自动旋转喷灌装置的射程是8米，它最大能喷灌多大面积的土地？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<result>200.96</result>