The length of the hour hand on the clock face is 5 cm, and the length of the minute hand is 8 cm. From 8:00 a.m. to 11:00 a.m., how many centimeters does the tip of the minute hand travel?
钟面上时针长5厘米，分针长8厘米，从上午8时到上午11时，分针针尖走过的路程是多少厘米．
<gadget id="calculator">11 - 8</gadget>
<output>3</output>

<gadget id="calculator">3.14 * 8 * 2 * 3</gadget>
<output>150.72</output>

<result>150.72</result>