Suppose that a number has more digits than can be conveniently handled or stored. In rounding (as opposed to truncation), the original number is replaced by the number with the required number of digits that is closest to it. Thus, when rounding to 1 decimal place, the number 1.875 becomes 1.9 and the number 1.845 becomes 1.8. It is said that the number is accordingly rounded up or rounded down. When the original is precisely at a halfway point (for example, if 1.85 is to be rounded to 1 decimal place), it may be rounded up (to 1.9) or rounded down (to 1.8). Some authors like to recommend a particular way of deciding which to do. See also decimal places and significant figures.