Use a compass to draw a circle with a circumference of 18.84 cm. What is the area of the circle in square centimeters?
用圆规画一个周长为18.84厘米的圆，所画圆的面积是多少平方厘米．
<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>