When the distance between the two toes of the compass is 2 cm, what is the area of the circle drawn in cm**2.
当圆规的两脚尖之间的距离为2cm时，画出的圆的面积是多少cm**2．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<result>12.56</result>