Note that the important thing is not to worry about the actual number of digits but just compute the size of the sample space or the set, because in a contiguous range of numbers there will be equal number of multiple of a given number for a certain size of the set.
Note that the important thing is not to worry about the actual number of digits but just compute the size of the sample space or the set, because in a contiguous range of numbers there will be equal number of multiple of a given number for a certain size of the set.