Option to specify number of digits after point

[Ivan1981]

in size view.It would be nice option.

Example:
Size of my directory is 7.126KB

2 digits = 7.13KB
3 digits = 7.126KB
4 digits = 7.1260KB
etc, etc..

In some situations when I'm using automatic mode for file/dir size 2 digits after the point are not enough for me.