The minute hand of a clock is 5 cm long. From 2 o'clock to 3 o'clock, how many centimeters does the minute hand travel?
一个钟表的分针长5cm，从2时走到3时，分针走过了多少cm．
<gadget id="calculator">2 * 3.14 * 5</gadget>
<output>31.4</output>

<result>31.4</result>