It is known that trains travel an average of 240 kilometers per hour, and passenger cars travel an average of 60 kilometers per hour. It took Uncle Wang 3 hours to travel from Yichang to Wuhan by train. How long would it take for a passenger car to travel from Yichang to Wuhan?
已知动车平均每小时行240千米，客车平均每小时行60千米，王叔叔乘动车从宜昌到武汉用了3小时，如果乘客车从宜昌到武汉要多少小时？
<gadget id="calculator">3 / 60</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">240 * (1/20)</gadget>
<output>12</output>

<result>12</result>