There are three passenger cars, A and B from the East Station, and C from the West Station, traveling towards each other, A travels 1000 meters per minute, B travels 800 meters per minute, C travels 700 meters per minute, C meets A In the next 20 minutes, I encountered Car B again. How many meters is the distance between the east and west stations?
有三辆客车，甲乙两车从东站，丙车从西站相向而行，甲车每分钟行1000米，乙车每分钟行800米，丙车每分钟行700米，丙车遇到甲车后20分钟又遇到乙车．东西两站相距多少米．
<gadget id="calculator">700 + 800</gadget>
<output>1_500</output>

<gadget id="calculator">1_000 - 800</gadget>
<output>200</output>

<gadget id="calculator">20 / 200</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1_000 + 700</gadget>
<output>1_700</output>

<gadget id="calculator">1_500 * (1/10) * 1_700</gadget>
<output>255_000</output>

<result>255_000</result>