There is a circular flower bed in the park with a diameter of 16 meters. Build a 2-meter-wide path around it. What is the area of this path in square meters?
公园里有一个圆形花坛，直径16米．在它的周围修建一条2米宽的小路．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 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

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

<gadget id="calculator">100 - 64</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<result>113.04</result>