See screenshot. The last line was created by entering "_/4" which seems to have turned "9,0" into "90". This seems likely to be a localization problem
As seen in the screenshot, I am in Iceland and have localization set accordingly - I think. Not super sure what exactly the settings are.
Firefox 123.0 on Linux (xubuntu 22.04)
I expect the calculation to use 9, not 90, and therefore result in 2.25, not 22.5.
