The outer diameter of a car wheel is 0.75 meters. If the wheel rotates 400 times per minute when the car is running, how many meters does the car travel per minute?
一辆汽车车轮的外径是0.75米，如果汽车行驶时车轮每分钟转400圈，这辆汽车每分钟大约行驶多少米？
<gadget id="calculator">3.14 * 0.75 * 400</gadget>
<output>942</output>

<result>942</result>