How do I span a column in HTML?

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Tags

1. #merge
2. #should
3. #columns
4. #column
5. #provide
6. #table
7. #excel
8. #allows
9. #width
10. #program
11. #spreadsheet
12. #number
13. #single
14. #attribute
15. #colspan
16. #functionality
17. #specifies