Mingming's family bought a new wall clock. The minute hand is 15cm long and the hour hand is 6cm long. From 3:00 p.m. to 4:00 p.m., how many centimeters does the tip of the minute hand travel farther than the tip of the hour hand?
明明家新买了一只挂钟，量得分针长15cm，时针长6cm．从下午3时整到4时整，分针针尖比时针针尖多走多少厘米？
<gadget id="calculator">2 * 3.14 * 15</gadget>
<output>94.2</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">2 * 3.14 * 6 * (1/12)</gadget>
<output>3.14</output>

<gadget id="calculator">94.2 - 3.14</gadget>
<output>91.06</output>

<result>91.06</result>