The diameter of the front wheel of the road roller is 1.2 meters, and it rolls 6 times per minute. How many meters can it advance per minute?
轧路机前轮直径1.2米，每分钟滚动6周，每分钟能前进多少米？
<gadget id="calculator">3.14 * 1.2 * 6</gadget>
<output>22.608</output>

<result>22.608</result>