Yongchang Fitness Plaza has a circular flower bed with a diameter of 6 meters. Now it is planned to widen it by 1 meter. How much larger is the area of this flower bed than before?
永昌健身广场有一个直径6米的圆形花坛，现在计划在它周围拓宽1米，现在这个花坛的面积比原来大多少？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<gadget id="calculator">3.14 * 7</gadget>
<output>21.98</output>

<result>21.98</result>