A car transported poles to the line, loaded from the starting point, and pulled 4 poles each time. The distance between every two poles on the line was 50 meters. It was transported twice. After loading and unloading, it returned to the original place to share. 3 hours, including 30 minutes for loading a car, and 5 minutes for unloading a utility pole. The average speed of the car is 24 kilometers per hour. What is the distance in kilometers from the starting point to the first utility pole?
一辆汽车往线路上运送电线杆，从出发地装车，每次拉4根，线路上每两根电线杆间的距离为50米，共运了两次，装卸结束后返回原地共用了3小时，其中装一次车用30分钟，卸一根电线杆用5分钟，汽车运行时的平均速度是每小时24千米，则从出发点到第一根电线杆的距离是多少千米．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">24 * (4/3)</gadget>
<output>32</output>

<gadget id="calculator">32 - 0.3 - 0.3 - 0.4</gadget>
<output>31</output>

<gadget id="calculator">31 / 4</gadget>
<output>31/4 = around 7.75</output>

<result>31/4 = around 7.75</result>