When entering the length and width of an area (or any object), enter the units of meters and centimeters (if any) in separate cells. For example: 8m 65cm x 12m 50cm. The answer is rounded to the nearest 1/10 (tenth). That is, one number is shown after the period in the answer. For example: 10.5
Due to rounding, the result of very small dimensions (width and length of several centimeters) is displayed by the program as 0.0 (zero).