The speed of the ship in still water is 18 kilometers per hour. During the 176-kilometer voyage from A to B, the ship sailed along the current for 8 hours. If it sailed against the current for 112 kilometers, how many hours would it take in total?
静水中船速每小时18千米，从甲地到乙地的176千米航程中，这只轮船顺水航行了8小时，如果再逆水航行112千米，共需要多少小时．
<gadget id="calculator">176 / 8</gadget>
<output>22</output>

<gadget id="calculator">22 - 18</gadget>
<output>4</output>

<gadget id="calculator">18 - 4</gadget>
<output>14</output>

<gadget id="calculator">112 / 14</gadget>
<output>8</output>

<result>8</result>