The minute hand of a clock is 1.4 decimeters long, how many centimeters does the tip of the minute hand travel from 10 am to 11 am?
一个钟表的分针长1.4分米，从上午10时到上午11时，分针的针尖走过了多少厘米？
<gadget id="calculator">1.4 * 10</gadget>
<output>14</output>

<gadget id="calculator">2 * 3.14 * 14</gadget>
<output>87.92</output>

<result>87.92</result>