The diameter of the cross-section of a wheel of a road roller is 8 meters, if it rolls forward 6 times, how many meters will it advance?
一台压路机的轮子的横截面的直径是8米，如果它向前滚动6周，会前进多少米？
<gadget id="calculator">3.14 * 8 * 6</gadget>
<output>150.72</output>

<result>150.72</result>