The minute hand of a watch is 1.5 cm long. What is the distance traveled by the tip of the minute hand in one revolution?
手表的分针长1.5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 * 1.5 * 2</gadget>
<output>9.42</output>

<result>9.42</result>