The length of the hour hand of a large clock is 40 cm. From 10 am to 1 pm, what is the distance traveled by the tip of the hour hand in centimeters?
一个大钟，它的时针长40厘米，从上午10时走到下午1时，这根时针的尖端所走的路程是多少厘米．
<gadget id="calculator">3 / 360</gadget>
<output>1/120 = around 0.008333</output>

<gadget id="calculator">40 * 2 * 3.14 * 30 * (1/120)</gadget>
<output>62.8</output>

<result>62.8</result>