The minute hand of a clock is 15 cm long. How many centimeters does the tip of the minute hand make one revolution?
一个时钟的分针长15厘米，这根分针的尖端转动一周，所走的路程是多少厘米？
<gadget id="calculator">3.14 * 2 * 15</gadget>
<output>94.2</output>

<result>94.2</result>