There is a circular flower bed with a diameter of 16m, and a path with a width of 1m is built around it. What is the area of this path in square meters?
有一个直径是16m的圆形花坛，沿着它的四周修一条宽1m的小路，这条小路的面积是多少平方米？
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

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

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">81 - 64</gadget>
<output>17</output>

<gadget id="calculator">3.14 * 17</gadget>
<output>53.38</output>

<result>53.38</result>