It is known that the minute hand of a clock is 4 cm long, how many centimeters does it move from 9:00 am to 3:00 pm.
已知时钟的分针长4厘米，从上午9点到下午3点，它走了多少厘米．
<gadget id="calculator">2 * 3.14 * 4 * 6</gadget>
<output>150.72</output>

<result>150.72</result>