The front wheel of a road roller is cylindrical, the wheel width is 1.8 meters, and the diameter is 1 meter. If the front wheel rolls once, how many square meters is the rolling area?
一种压路机的前轮是圆柱形，轮宽为1.8米，直径是1米，前轮滚动一周，压路面积是多少平方米？
<gadget id="calculator">3.14 * 1 * 1.8</gadget>
<output>5.652</output>

<result>5.652</result>