The outer diameter of a bicycle tire is 0.7 meters. If the wheel rotates 100 revolutions per minute, how many meters can it travel per hour?
一种自行车轮胎的外直径是0.7米．如果车轮每分钟转100周，每小时可以行多少米？
<gadget id="calculator">3.14 * 0.7</gadget>
<output>2.198</output>

<gadget id="calculator">2.198 * 100</gadget>
<output>219.8</output>

<gadget id="calculator">219.8 * 60</gadget>
<output>13_188</output>

<result>13_188</result>