The hour hand of a table clock is 5 cm long. After 6 hours, how many centimeters has the tip of the hour hand moved?
一座台钟的时针长5厘米，经过6小时，时针的尖端移动了多少厘米．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">2 * 3.14 * (5/2)</gadget>
<output>15.7</output>

<result>15.7</result>