A concert hall originally have 14 rows of seats with a few chairs left over not enough to make another row.if 4 rows are removed and all the chairs are used to extend the extend the existing 10 rows.there will be exactly 32 seats in a row with no chairs left.how many chairs were used in the original setting.
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320
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308
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308
rounddown(32*10/14)*14
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谢谢。答案是308 。怎么做的？
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320=14×22+12
一共320把椅子，按14排算，每排22把，余12把，所以最初的安排是用了308把。
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Extend the existing 10 rows, there will be exactly 32 seats in a row with no chairs left- This means the total chairs number is 32*10=320
320/14=22.86 means originally with 14 rows, each row has maximum 22 chairs
Therefore original chairs used are: 22*14=308
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谢谢热心人的相助！
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