The minute hand of a large clock is 40 cm long. After 45 minutes, how many centimeters has the tip of the minute hand traveled?
一只大钟的分针长40厘米．经过45分钟后，这根分针的针尖所走的路程是多少厘米？
<gadget id="calculator">45 / 60</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.14 * 40 * 2 * (3/4)</gadget>
<output>188.4</output>

<result>188.4</result>