A ship travels from A to B, travels 24 kilometers per hour against the current to reach B, and then returns to A along the current, which takes 2.5 hours less than going against the current. The known water velocity is 3 kilometers. How far is the distance between A and B?
某船从甲地到乙地，逆水每小时行24千米到乙地后，又顺水返回甲地，比逆水少用2.5小时，已知水流速度是3千米，甲乙两地相距多远？
<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">24 + 3 + 3</gadget>
<output>30</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/24) + (1/30)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">2.5 / (3/40)</gadget>
<output>33.333333</output>

<result>33.333333</result>