Two vehicles transport goods from a certain place to a construction site 165 kilometers away at the same time. Vehicle A arrives (4/5) hours earlier than vehicle B. When vehicle A arrives, vehicle B is still 24 kilometers away from the construction site. Vehicle A is finished. How many hours did it take?
两车同时从某地运送货物到距离165千米的工地，甲车比乙车早到(4/5)小时，当甲车到达时，乙车距工地还有24千米，甲车行完全程用了多少小时？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">24 / (4/5)</gadget>
<output>30</output>

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

<gadget id="calculator">(11/2) - (4/5)</gadget>
<output>47/10 = around 4.7</output>

<result>47/10 = around 4.7</result>