The front wheel of a road roller is cylindrical, the width of the wheel is 1.5 meters, and the diameter is 2 meters. The road roller rolls forward 10 times per minute.
一台压路机的前轮是圆柱形，轮宽1.5米，直径2米，压路机每分钟向前滚动10周，压过的路面是多少平方米．
<gadget id="calculator">3.14 * 2 * 1.5</gadget>
<output>9.42</output>

<result>9.42</result>