The minute hand of a wall clock is 5 cm long, how many centimeters does the tip of the minute hand move when the hour hand makes one revolution?
一个挂钟分针长5厘米，当时针走一圈时，分针的尖端走了多少厘米．
<gadget id="calculator">2 * 3.14 * 5</gadget>
<output>31.4</output>

<gadget id="calculator">31.4 * 12</gadget>
<output>376.8</output>

<result>376.8</result>