A passenger ship travels 27 kilometers per hour, sails 160 kilometers downstream in a big river, and the water speed is 5 kilometers per hour, how many hours does it need to sail?
一艘客轮每小时行驶27千米，在大河中顺水航行160千米，每小时水速5千米，需要航行多少小时？
<gadget id="calculator">27 + 5</gadget>
<output>32</output>

<gadget id="calculator">160 / 32</gadget>
<output>5</output>

<result>5</result>