Two cars A and B set off from AB at the same time and head towards each other. The speed of B is A (4/5). One hour after the departure of the two cars, B was repaired for 30 minutes due to a breakdown. Then continue to move forward at the original speed (3/4), and then the two cars meet. This is (3/8) hours later than the expected meeting time. It is known that the distance between the meeting point of the two vehicles is 37.5 kilometers from the midpoint. So how long is the road between AB and AB?
甲乙两车同时从AB两地同时出发相向而行，乙的速度是甲的(4/5)，两车出发1小时后，乙车因发生故障原地修理了30分钟．然后以原速的(3/4)继续前进，然后两车相遇．这样比预计相遇时间推迟了(3/8)小时．已知两车相遇点距中点37.5千米．那么AB之间的公路长为多少千米？
<gadget id="calculator">23 / 36</gadget>
<output>23/36 = around 0.638889</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(23/36) - (1/2)</gadget>
<output>5/36 = around 0.138889</output>

<gadget id="calculator">37.5 / (5/36)</gadget>
<output>270</output>

<result>270</result>