There is a total number of buses running on a fixed route, excluding the starting station and the terminal station, there are 8 stops in the middle, if the bus starts from the starting station, it does not count as the terminal station, and boards at every stop Among the passengers, another passenger happens to get off from this station to every subsequent station. If you were the captain of a bus, what is the minimum number of seats you would have to arrange to ensure that every passenger had a seat? Answer: At least how many.
有一辆公交车总数在一个固定的路线上行驶，除去起始站和终点站，中途有8个停车站，如果这辆公交车从起始站开始乘客，不算终点站，每一站上车的乘客中恰好又有一位乘客从这一站到以后的每一站下车．如果你是公交车的车长，为了确保每个乘客都有座位，你至少要安排多少个座位？答：至少多少个．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>