Not sure what happend to my suggestion but I thought this was a good question:
math.stackexchange.com/questions/746859 and wondered if closure was down to the "level" of the question rather than the content. Could it make a good signpost to some content about place value or rounding off infinitely many zeroes? The answer by imu96 is good and maybe it would be better to upvote the good answers rather than remove the question.