The voyage between port A and port B is 297.5 kilometers. A ship sails from port A to port B. After driving for 8 hours, it is still 17.5 kilometers away from port B. If it travels at this speed, it will still arrive at port B. How many hours will it take?
甲港和乙港之间的航程为297.5千米，一艘轮船从甲港开往乙港，行驶了8小时后，离乙港还有17.5千米，照这样的速度行驶，到达乙港还需行几小时？
<gadget id="calculator">297.5 - 17.5</gadget>
<output>280</output>

<gadget id="calculator">280 / 8</gadget>
<output>35</output>

<gadget id="calculator">17.5 / 35</gadget>
<output>0.5</output>

<result>0.5</result>