note 1508 deleted from Floating point numbers by jeroen

Hi, What I want but could not get is: Getting the integer part of a double which is nearest products of another number, say 100, which is less then orjinal number. e.g: 72289.43 => new number should be 72200(for x100), 72000(for x1000). 72.1 => new number should be 70 (for x10, for x100, ...). I could not find any idea how can I do with PHP. Of course in double, integer, real types... Not as STRING!. I can do it as string of course... In pascal or C,C++, there is