The speed of a ship in still water is 14 kilometers per hour, and the speed of the river is 3 kilometers per hour. The ship sails from upstream port B to downstream port A for 11 hours. Then the ship returns from port A to port B. How many hours does the port take.
一艘轮船在静水中的速度是每小时14千米，河水流速是每小时3千米，这艘轮船从上游乙港到下游甲港共航行了11小时，那么这艘轮船从甲港返回乙港需要多少小时．
<gadget id="calculator">14 - 3</gadget>
<output>11</output>

<gadget id="calculator">11 / 11</gadget>
<output>1</output>

<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<gadget id="calculator">14 + 3</gadget>
<output>17</output>

<result>17</result>