The minute hand of a wall clock is 10 cm long, what is the distance traveled by the tip of the minute hand from 1:00 to 3:00?
一只挂钟的分针长10厘米，从1点到3点这根分针的针尖走过的长度是多少厘米．
<gadget id="calculator">2 * 3.14 * 10 * 2</gadget>
<output>125.6</output>

<result>125.6</result>