A circular flower bed with a diameter of 6 meters is expanded. The ratio of the expanded diameter to the original diameter is 3:1. What is the area of the expanded flower bed in square meters?
把一个直径是6米的圆形花坛进行扩建，扩建后的直径与原来直径比是3：1，扩建后花坛的面积是多少平方米？
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 ** 2</gadget>
<output>81</output>

<gadget id="calculator">3.14 * 81</gadget>
<output>254.34</output>

<result>254.34</result>