The hour hand of a wall clock is 20 cm long, one day and one night. How many meters has the tip of the hour hand traveled?
一个挂钟的时针长20厘米，一昼夜．这根时针的尖端走了多少米．
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">3.14 * 20 * 2 * (1/50)</gadget>
<output>2.512</output>

<result>2.512</result>