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supa721

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發表於 2012-10-14 10:21 AM | 顯示全部帖子 ::: 一按馬上把這個話題放上你的facebook!! :::
160x125/2=10000, which gives you nice 4 space (4 zeros) to add your last 4 digits twice then divided by 2

It will work with any length of number that has at least 5 digits (of course).
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