The front wheel of a road roller is 1.6 meters straight. If the front wheels turn 5 revolutions per minute, how far can the road roller go in half an hour?
一压路机的前轮直是1.6米．如果前轮每分钟转动5周，压路机半小时能前进多远？
<gadget id="calculator">3.14 * 1.6 * 5 * 30</gadget>
<output>753.6</output>

<result>753.6</result>