There is a circular fountain in West Lake Park with a circumference of 31.4 meters. A road with a width of 2.5 meters is paved around the fountain. What is the area of this road?
西湖公园有一个圆形喷水池，周长是31.4米，在喷水池的周围铺一条2.5米宽的路，这条路的面积是多少？
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 2.5</gadget>
<output>7.5</output>

<gadget id="calculator">7.5 ** 2</gadget>
<output>56.25</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">56.25 - 25</gadget>
<output>31.25</output>

<gadget id="calculator">3.14 * 31.25</gadget>
<output>98.125</output>

<result>98.125</result>