Printing Side by Side on Same Page

A user has a very long but narrow spreadsheet he wants to print. But he wants it to print, say, the first 20 rows at the left of the page (in Landscape), the next 20 rows in the middle of the page, and the next 20 rows at the right. Then this would continue for however many pages is needed.

Ideas?

Your macro approach would certainly work, so thanks for suggesting it. But I was hoping for an Excel or print setup feature I was unaware of to give him a more direct and flexible solution. One thing I had hoped would work but doesn't is to go into Printer Properties and select multiple sheets under Page Layout. But this prints multiple pages in Portrait mode even though it's set to Landscape, or the print is ridiculously tiny.

The only other idea, one that is not so good, is to copy the data to Word and then select the option for three columns. Word knows all about printing in multiple columns. Excel, not so much.