The minute hand of a wall clock is 5 cm long, how many centimeters does the tip of the minute hand travel in 2 revolutions?
一只挂钟的分针长5厘米，这根分针的尖端转2圈走了多少厘米．
<gadget id="calculator">3.14 * 2 * 5 * 2</gadget>
<output>62.8</output>

<result>62.8</result>