The front wheel of a road roller is a cylinder with a width of 2m and a diameter of 2m. If it rotates 5 times, how many square meters will be rolled?
一台压路机的前轮是圆柱体，轮宽2m，直径2m．如果它转动5圈，一共压路多少平方米？
<gadget id="calculator">3.14 * 2 * 2 * 5</gadget>
<output>62.8</output>

<result>62.8</result>