Adjust the rows, cols, and font size for whatever looks best on your printer. When doing division problems, set the cols equal to 5 or so to leave room for kids to write the answers.
Once on the test page, hit your browser's Reload or Refresh button to generate a new test with the same options.
The formatting for division ("/") is still a touch strange. Try decreasing font sizes and set the cols equal to 5 or so. Unfortunately, I have no knowledge of, nor control over, your browser or print settings. Play with it to find out what works on your computer.
Hope it's useful.
-- Temsha and daxm