The minute hand of a wall clock is 5 cm long. When the hour hand moves from 1 to 3, how many centimeters does the tip of the minute hand move?
一个挂钟分针长5厘米，时针从1走到3，分针的尖端走了多少厘米．
<gadget id="calculator">3.14 * 5 * 2 * 2</gadget>
<output>62.8</output>

<result>62.8</result>