There is a circular flower bed in the park with a circumference of 25.12m. Widen 5m around it to plant peonies, how big is the area for planting peonies?
公园里有一个圆形花坛，周长为25.12m．在它的周围加宽5m种牡丹花，种牡丹花的面积有多大？
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">9 ** 2</gadget>
<output>81</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">81 - 16</gadget>
<output>65</output>

<gadget id="calculator">3.14 * 65</gadget>
<output>204.1</output>

<result>204.1</result>