Right, because you are dividing by twice as much as other people. If you ever decide to use quarter-deck estimations it will be difficult using half-deck resolution.
But is that half deck estimation or half deck resolution? If there is a full deck left, do you divide by 1 or by 2? I think bruisedlee is asking about the latter.
I like to multiply by one. Sometimes, if I'm really daring, I multiply by two but use only half the results.
Forgive the sarcasim, but what is the point of dividing by one?