The radius of the front wheel of a road roller is 0.4 meters. If the front wheel rotates 6 times per minute, it can turn from one end of the road to the other in ten minutes. How many meters is the road?
一台压路机前轮半径是0.4米，如果前轮每分钟转动6周，十分钟可以从路的一端转到另一端，这条路约长多少米？
<gadget id="calculator">3.14 * 0.4 * 2 * 6 * 10</gadget>
<output>150.72</output>

<result>150.72</result>