Go to File > Save as. Save the file as XLS or XLSX. First, open the Microsoft Word app and click on the File > Open option to import the source DOC or DOCX file that you want to convert to Excel.

However, using workbooks in Excel, one would need to save each page of the workbook as a .csv file, then import it, which could get rather cumbersome when dealing with many large workbooks, as I am.