I have an xls file that is auto-generated by a web site I use. No choice about format: They provide .xls file and nothing else. Several of the cells have what should be text, but is all numeric holding 18 characters. Like this: 821566612059527774. By the time I see it in Calc, it has already been converted to a number with loss of precision, like this: 8.21566612059528E+017. I can see that the original xls file holds the correct data (emacs can open it). I can figure out no way of preserving the data as text while the import happens: The options dialog only wants me to choose a language.
Is there some other way to do an import? Can I somehow import the .xls file into the cells of an existing table where I have already set the column type? Something else?