There is a circular flower bed in the school. Its diameter is 4.8m. What is the circumference of the flower bed in meters?
学校有一个圆形花坛，它的直径是4.8m，这个花坛的周长是多少米？
<gadget id="calculator">3.14 * 4.8</gadget>
<output>15.072</output>

<result>15.072</result>