An express train and a slow train are traveling towards each other from A and B at the same time. The speed ratio of the two cars is 3:2. It takes 16.5 hours for the slow train to complete the journey. How many hours will the two cars meet after departure?
一辆快车和一辆慢车由甲、乙两地同时相向而行，两车速度比是3：2，慢车行完全程需16.5小时，两车出发后多少小时相遇．
<gadget id="calculator">2 * 16.5</gadget>
<output>33</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">33 / 5</gadget>
<output>33/5 = around 6.6</output>

<result>33/5 = around 6.6</result>