Either that, or one bio is 46.0130112422 metres. Basically, it seems the scale of the Bionicle universe wasn't well thought out. We know one bio is roughly 4.5 feet because Toa are about 7.2 feet or 1.6 bio tall. That statistic is nearly as old as our statistics about the size of Metru Nui if I'm not mistaken — it's from the 2005 BIONICLE Encyclopedia. I think it's more likely that the locations on that map of the Matoran Universe are not drawn to scale. That's what I'm pointing out. If we work from the bio, kio and mio, we get a smaller MU than if we work from 40 million feet. Plus, everything seems to work if we just ignore the 40 million, which makes me think that the figure wasn't really that well thought out by the story team.