The minute hand of a clock is 15 cm long. How many cm does the tip of the minute hand travel after 1 hour?
一台座钟的分针长15cm，1小时后，分针的尖端走了多少cm．
<gadget id="calculator">3.14 * 15 * 2</gadget>
<output>94.2</output>

<result>94.2</result>