calc 7.0.6 can't enter numbers into xlsx

Someone sent me an ‘xlsx’ spreadsheet to enter some mileage for reimbursement. Any time I try to enter numbers where it expects them, I get the following error: Numbers only, and rounded to the tenth.

Any ideas?

Thanks

Are you separatting decimals with a comma or with a point? And (if hint is correct) use only one decimal position.


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Could you attach a file (of course, without real numbers)?