A circular fountain with a radius of 8 meters. A 2-meter-wide path is paved around the pool. What is the area of the path?
一个圆形喷水池，半径为8米．沿水池周围铺了一条2米宽的小路，小路的面积是多少？
<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>