The diameter of the front wheel of a road roller is 1.5 meters, and it turns 10 times per minute. How many meters does the road roller advance per minute?
一种压路机的前轮直径是1.5米，每分钟转10圈，压路机每分钟前进多少米？
<gadget id="calculator">3.14 * 1.5 * 10</gadget>
<output>47.1</output>

<result>47.1</result>