Two people, A and B, go from A to B at the same time. When A travels 200 meters, B travels the whole distance (1/5), and when B travels 200 meters, A travels the whole distance (5/16). How many meters did the other person walk when the faster one reached the midpoint?
甲乙两人同时从A地到B地，当甲行200米时，乙行了全程的(1/5)，乙行200米时，甲行了全程的(5/16)，问两人中较快一人到达中点时，另一人走了多少米？
<result>640</result>