The front wheel of a road roller is cylindrical, with a wheel width of 1.5 meters and a radius of 0.6 meters. If the front wheel rotates once, how many square meters is the rolling surface?
一台压路机的前轮是圆柱形，轮宽1.5米，半径0.6米，前轮转动一周，压路面面积多少平方米？
<gadget id="calculator">2 * 3.14 * 0.6 * 1.5</gadget>
<output>5.652</output>

<result>5.652</result>