A cylindrical flower bed is to be built next to the school playground. The inner diameter of the bottom of the flower bed is 4 meters and the height is 0.6 meters. If the height of the filled soil inside is 0.4 meters, how many cubic meters of filled soil are needed to build this flower bed?
学校操场旁边要修建一个圆柱形花坛，花坛的底面内直径是4米，高为0.6米．如果里面填土的高度是0.4米，修建这个花坛共需要填土多少立方米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 0.4</gadget>
<output>5.024</output>

<result>5.024</result>