The diameter of the front wheel of a bicycle is 0.8 meters. If the bicycle makes 100 revolutions per minute, how many meters per minute can it travel?
一辆自行车前轮的直径是0.8米．如果这辆自行车每分钟转100圈，那么它每分钟可行多少米？
<gadget id="calculator">3.14 * 0.8 * 100</gadget>
<output>251.2</output>

<result>251.2</result>