The distance between A and B is 360 kilometers, and it takes 35 hours for a boat to go back and forth. Sailing upstream takes 5 hours longer than sailing downstream. Now there is a sudden wind blowing, and the wind speed is in the same direction as the water speed. In this case, how many hours does it take for a ship with a still water speed of 12 km/h to go back and forth between A and B?
甲乙两地相距360千米，一轮船往返需要35小时，逆流航行比顺流航行多花5小时．现在突然起风，风速与水流速度大小方向都一致．在这种情况下，一艘静水速度12千米/小时的船往返甲乙两地一次需要多少小时？
<gadget id="calculator">35 - 5</gadget>
<output>30</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">360 / 15</gadget>
<output>24</output>

<gadget id="calculator">35 + 5</gadget>
<output>40</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">360 / 20</gadget>
<output>18</output>

<gadget id="calculator">24 - 18</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<gadget id="calculator">360 / 9</gadget>
<output>40</output>

<gadget id="calculator">24 + 40</gadget>
<output>64</output>

<result>64</result>