The minute hand of a wall clock is 1.5dm long, what is the distance traveled by the tip of the minute hand after 45 minutes?
一只挂钟的分针长1.5dm，经过45分钟后，分针针尖走过的路程是多少？
<gadget id="calculator">45 / 60</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 * 3.14 * 1.5 * (3/4)</gadget>
<output>7.065</output>

<result>7.065</result>