The radius of a circular flower bed is 3 meters. Roses were planted in (1/3) of the flower beds, and peonies were planted in the rest. How many square meters is the peony planting area?
一个圆形花坛的半径是3米．花坛的(1/3)种了月季，其余的部分种了牡丹．种牡丹的面积是多少平方米？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3.14 * 9 * (2/3)</gadget>
<output>18.84</output>

<result>18.84</result>