Three fast, medium and slow cars start from the same place at the same time and chase a cyclist in front along the same road. It is known that the speeds of these three vehicles are 54 kilometers per hour, 22 kilometers and 12 kilometers per hour respectively. The express car and the medium car took 2 hours and 6 hours to catch up with the cyclist respectively. So how long does it take for a slow car to catch up with a cyclist?
快、中、慢三辆车同时从同一地点出发，沿同一条公路追赶前面的一个骑车人．已知这三辆车的速度分别是每小时54千米、22千米、12千米，快车和中车分别用2小时、6小时追上了骑车人．那么慢车要多少时间追上骑车人？
<gadget id="calculator">132 - 108</gadget>
<output>24</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">54 - 6</gadget>
<output>48</output>

<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">48 * (1/3)</gadget>
<output>16</output>

<result>16</result>