The waterway between the two docks of A and B is 288 kilometers long, and it takes 8 hours for a cargo ship to travel downstream and 16 hours to go upstream. If it takes 12 hours for a passenger ship to go downriver, what is the speed of the passenger ship in still water?
甲乙两个码头间的水路长288千米，货船顺流而下需要8小时，逆流而上需要16小时．如果客船顺流而下需要12小时，那么客船在静水中的速度是多少？
<gadget id="calculator">288 / 12</gadget>
<output>24</output>

<gadget id="calculator">288 / 8</gadget>
<output>36</output>

<gadget id="calculator">288 / 16</gadget>
<output>18</output>

<gadget id="calculator">36 - 18</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">24 - 9</gadget>
<output>15</output>

<result>15</result>