The hour hand of the watch is 1.8 cm long, what is the length of the path traveled by the tip of the hand from 8:00 am to 6:00 pm.
手表的时针长为1.8厘米，从上午8点到下午6点针尖所走过的途径的长度为多少厘米．
<gadget id="calculator">360 / 12</gadget>
<output>30</output>

<gadget id="calculator">10 * 30</gadget>
<output>300</output>

<gadget id="calculator">300 / 360</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 * 3.14 * 1.8 * (5/6)</gadget>
<output>9.42</output>

<result>9.42</result>