The circumference of a circular flower bed is 15.7 meters. If a path with a width of 1 meter is built around it, what is the area of the path in square meters?
一个圆形花坛的周长是15.7米，如果在它的周围修一条宽1米的小路，小路的面积是多少平方米？
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">15.7 / 6.28</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 + 1</gadget>
<output>3.5</output>

<gadget id="calculator">3.5 ** 2</gadget>
<output>12.25</output>

<gadget id="calculator">2.5 ** 2</gadget>
<output>6.25</output>

<gadget id="calculator">12.25 - 6.25</gadget>
<output>6</output>

<gadget id="calculator">3.14 * 6</gadget>
<output>18.84</output>

<result>18.84</result>