In the same clock, the length of the minute hand from the fixed point to the tip of the needle is 10 cm. If the hour hand moves for 2 hours, what is the distance in cm that the tip of the minute hand passes.
在同一钟表内，分针从固定点到针尖的长是10厘米，若时针走2小时，分针针尖通过的距离是多少厘米．
<gadget id="calculator">2 * 3.14 * 10 * 2</gadget>
<output>125.6</output>

<result>125.6</result>