A and B go from A to B at the same time, A is 9 meters per second, B is 8 meters per second, A travels to 18 kilometers and then goes back to pick up things, so they arrive at B 1 hour later than B. What is the distance between A and B?
甲、乙两人同时从A地去B地，甲每秒9米，乙每秒8米，甲行至18千米处又回去取东西，因此比乙迟到1小时到B地．A、B两地相距多少米？
<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">18 * 1_000 * 2 * 8</gadget>
<output>288_000</output>

<result>288_000</result>