A road roller has a diameter of 1.5 meters and a length of 2 meters. If the roller rotates 8 times per minute, how many square meters of road surface does it press per minute?
一种压路机的滚筒直径是1.5米，长2米，如果滚筒每分钟转8周，它每分钟压过的路面面积是多少平方米？
<gadget id="calculator">3.14 * 1.5 * 8 * 2</gadget>
<output>75.36</output>

<result>75.36</result>