A ship goes from port A to port B and travels 24 kilometers per hour against the current, and then returns to port A along the current after arriving at port B. It is known that sailing along the current will take 5 hours less than sailing against the current, and the current speed is 3 kilometers per hour. , How many kilometers is the distance between the two ports of B?
一艘船从甲港到乙港，逆水每小时行24千米，到乙港后又顺水返回甲港，已知顺水航行比逆水航行少用5小时，水流速度为每小时3千米，甲、乙两港相距多少千米．
<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">5 / (3/40)</gadget>
<output>200/3 = around 66.666667</output>

<result>200/3 = around 66.666667</result>