TheatreSquare
TheatreSquareinthecapitalcityofBerlandhasarectangularshapewiththesizen × mmeters.Ontheoccasionofthecity'sanniversary,adecisionwastakentopavetheSquarewithsquaregraniteflagstones.Eachflagstoneisofthesizea × a.WhatistheleastnumberofflagstonesneededtopavetheSquare?It'sal
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