The diameter of the front wheel of a road roller is 1.5 meters, and it turns 8 times per minute. How many meters does the road roller advance in half an hour?
一种压路机的前轮直径是1.5米，每分转8圈，压路机半小时前进多少米？
<gadget id="calculator">3.14 * 1.5 * 8 * 30</gadget>
<output>1_130.4</output>

<result>1_130.4</result>