I think Stahlseele was working from the fact that m is the 'symbol' for meters, while M or MPH is miles per hour. Lots of bad english and really horrible math on this forum, so confusion and arguments will ensue.
ps - Suddenly, over the past week only, I keep having to log in every time I come to these forums. I wonder if it's a preview of glitches working up in the php coding? Oh, and also, while I'm on the topic of glitches, instead of using topicseen.new#new when reply emails are sent out, why not use the actual number of the new post like every other forum in the world, so I don't always end up at the top of a page, having to find the new post, rather than being at the new post automatically?