A road roller has a cylindrical front wheel with a width of 2 meters and a diameter of 1.5 meters. How many square meters is the area of the road that the front wheel rotates once?
一台压路机的前轮是圆柱形，轮宽2米，直经是1.5米．前轮转动一周压路的面积是多少平方米？
<gadget id="calculator">3.14 * 1.5 * 2</gadget>
<output>9.42</output>

<result>9.42</result>