The circumference of a circular pool is 18.84 meters, what is the area in square meters?
圆形水池，周长是18.84米，面积是多少平方米？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>