car travels from A to B at a speed of 90 kilometers per hour. At the same time, a truck travels from B to A. After 6 hours, the two vehicles meet. After meeting, the car took another 4 hours to arrive at B. How many hours does it take for the truck to arrive at A after the meeting?
一辆小轿车从甲地开往乙地，每小时行驶90千米，同时一辆卡车从乙地开往甲地，6小时后两车相遇．相遇后，小轿车又用了4小时到达乙地．问相遇后卡车多少小时可到达甲地？
<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>