A large clock has a minute hand that is 80 cm long. What is the distance traveled by the tip of the minute hand in one revolution?
一只大钟，它的分针长80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">2 * 3.14 * 80</gadget>
<output>502.4</output>

<result>502.4</result>