The diameter of the driving wheel of the locomotive is 1.5 meters. If it rotates 350 times per minute, how many meters does the locomotive advance per minute?
火车头的主动轮的直径是1.5米，如果每分钟转350周，这个火车头每分钟前进多少米？
<gadget id="calculator">3.14 * 1.5 * 350</gadget>
<output>1_648.5</output>

<result>1_648.5</result>