That would be 400. Think of it like having your hands on a balloon, where the number directly to the right of the number you are rounding is the number of fingers NOT touching the balloon. With 1 finger gone, it stays DOWN, showing the number rounding down. The same goes for 2 fingers, 3 fingers, and four fingers. After taking 5 fingers or more off, however, it will go UP, showing the number rounding up.
