The minute hand of a clock is 10 cm long. From 4 o'clock to 6 o'clock, how many centimeters does the tip of the minute hand travel?
一块钟表的分针长10cm，从4时走到6时，分针尖走过了多少厘米．
<gadget id="calculator">2 * 3.14 * 10 * 2</gadget>
<output>125.6</output>

<result>125.6</result>