The circumference of a circular flower pond is 100.48 meters, what is its area?
一个圆形花池的周长为100.48米，它的面积是多少？
<gadget id="calculator">100.48 / 3.14 / 2</gadget>
<output>16</output>

<gadget id="calculator">16 ** 2</gadget>
<output>256</output>

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

<result>803.84</result>