Format as decimal number che fa i capricci

Hi everyone,
Since this afternoon, I haven't been able to figure out what I'm doing wrong. Basically, even though I use the "format as decimal number" function, the value isn't rounded to "3.9" but remains "3.85714" despite the fact that I specified that the decimal point should only be 1.
Regards
Nicola

You divide by 7 AFTER your set the decimal?

image

:person_shrugging:

oh well

Much better