The hour hand is 15 cm long and the minute hand is 18 cm long. From 9 am to 6 pm, how many centimeters does the tip of the hour hand travel?
时针长15厘米，分针长18厘米，从上午9时到下午6时，时针尖端所走路程是多少厘米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.14 * 2 * 15 * (3/4)</gadget>
<output>70.65</output>

<result>70.65</result>