In the park, a path with a width of 2 meters surrounds a circular pool. The diameter of the pool is 20 meters. How many square meters does the path occupy?
公园里，一条宽2米的小路围绕着圆形水池的一周，水池的直径是20米，小路的占地面积是多少平方米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

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

<gadget id="calculator">144 - 100</gadget>
<output>44</output>

<gadget id="calculator">3.14 * 44</gadget>
<output>138.16</output>

<result>138.16</result>