How to format a number of unknown length in 1C?

Question

1C

Hello toast people.
Let's say there are numbers:
45
37.12
38.5
it is necessary that they be in the following format:
45.00
37.12
38.50
But so that the SKD does not go crazy when summing up (counts adequately). What should be the format string?
Z.Y. Here it is, soft typing without the usual int, float and double.

Answer 1

The format "NPV=2" should be set in the format of the field design.