It's amazing what can happen during an hour or two away from the forum! I know that we see lots of silly quibbling exchanges (and that I am party to a fair number), but I think that all but the last one of the last 15 posts above may take some sort of 'biscuit'!
In any event, 'discussions' about the way in which the (very simple) arithmetic is undertaken (I was brought up to do it with a slide rule!) are pretty insignificant when there is uncertainty regarding the figures being fed into the calculations (i.e. as to whether the rated power relates to 220V or 240V) - as they say, "garbage in, garbage out".
Kind Regards, John