A passenger train and a freight train run towards each other from A and B at the same time, and meet each other in 6 hours. After the meeting, the bus traveled for another 4 hours to reach B. How many hours will the truck have to drive to reach point A at this time?
一列客车和一列货车同时从A、B两地相向而行，6小时相遇．相遇后客车又行了4小时到达B地．这时货车还要行驶多少小时才能到达A地？
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">6 * (3/2)</gadget>
<output>9</output>

<result>9</result>