The spraying range of the automatic spraying machine on the lawn of Qingfeng Lake Park is 16 meters. How many square meters is the spraying area of this sprayer?
清风湖公园草坪的自动喷洒机的喷洒射程是16米．这种喷洒机的喷洒面积是多少平方米？
<gadget id="calculator">16 ** 2</gadget>
<output>256</output>

<gadget id="calculator">3.14 * 256</gadget>
<output>803.84</output>

<result>803.84</result>