Two trucks, A and B, set off from a certain place at the same time and transport a batch of goods to a farm 165 kilometers away. Car A arrives 0.8 hours earlier than car B. When car A arrives, car B is still 24 kilometers away from the farm. How many hours did it take car A to travel the whole way?
甲乙两辆卡车同时从某地出发，运送一批货物到距离165千米的农场．甲车比乙车早到0.8小时，当甲车到达时，乙车还距离农场24千米，甲车行驶全程用了多少小时．
<gadget id="calculator">24 / 0.8</gadget>
<output>30</output>

<gadget id="calculator">165 / 30</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">(11/2) - 0.8</gadget>
<output>4.7</output>

<result>4.7</result>