I've seen instructions on how to get rid of the #DIV/0! error on a single cell, but I'm looking for the easiest way to deal with all errors at once in the whole document.
The reason for that is the following: The document was created in LibreOffice, and apparently its behavior is different; instead of an error, LibreOffice displays a blank cell. This problem wasn't identified because all formulas that depend on that result also work (by assuming value 0, I assume). When I open the document in Microsoft Excel 2013, however, any DIV/0! error will cascade down and prevent other formulas that depend on the result to work as well. The problem is that the amount of #DIV/0! errors in the document is way too high to fix them individually.
Example of the content of a problematic cell:
Where Q13 has a fixed value of 12, and K13 is empty.