A road roller has a cylindrical drum with a base radius of 4 dm and a length of 2 m. If it rotates 10 times in 1 minute, how much m**2 is the area of the road that is pressed in half an hour?
一种压路机的滚筒是圆柱形，底面半径为4dm，长为2m．如果1分钟转动10周，那么半小时压过的路面面积为多少m**2．
<gadget id="calculator">3.14 * 4_800</gadget>
<output>15_072</output>

<result>15_072</result>