There is a circular path around the circular flower bed. The diameter of the flower bed is 4 meters and the width of the path is 2 meters. How many square meters does this circular path occupy?
圆形花坛的周围是一条环形小路，花坛直径是4米，小路宽2米，这条环形小路占地多少平方米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 + 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">50.24 - 12.56</gadget>
<output>37.68</output>

<result>37.68</result>