A car wheel has a diameter of 5 decimeters and rotates 400 times per minute while driving. Approximately how many meters does this car travel per minute?
一辆轿车车轮的直径是5分米，行驶时每分钟转400周．这辆轿车每分钟大约行驶多少米？
<gadget id="calculator">3.14 * 5 * 400</gadget>
<output>6_280</output>

<gadget id="calculator">6_280 / 10</gadget>
<output>628</output>

<result>628</result>