Uncle Li is going from Changchun to Dalian. It takes 4 hours to take the high-speed train, 37.5% of the time to take the high-speed train by plane, and 6.4 times the time to take the express train. How many hours does it take Uncle Li to travel from Changchun to Dalian by express train?
李叔叔准备从长春去大连，乘坐高铁列车需要4小时，乘坐飞机的时间是乘坐高铁列车的37.5%，乘坐特快列车的时间是乘坐飞机的6.4倍．李叔叔乘坐特快列车从长春去大连需要几小时？
<gadget id="calculator">37.5 / 100</gadget>
<output>0.375</output>

<gadget id="calculator">4 * 0.375 * 6.4</gadget>
<output>9.6</output>

<result>9.6</result>