A circular flower bed in the green square has a diameter of 8 meters, and now the surrounding area is expanded by 2 meters. How many square meters has the area of the flower bed increased compared to the original?
绿化广场的一个圆形花坛，直径8米，现在周围向外扩宽2米，花坛面积比原来增加了多少平方米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

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

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

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

<gadget id="calculator">113.04 - 50.24</gadget>
<output>62.8</output>

<result>62.8</result>