Combine 3 Excel files, (a total of 328 tables or worksheets)

I need someone who is familiar with Excel and combining worksheets. If you know how to do this it shouldn't take you longer than 10-15 minutes. I just have no clue how to do it. I have 3 excel files. The first excel file has 78 workbooks. Meaning when I open up the excel file there are 78 different pages of data. Each page has 35 listings. I want to combine all 78 pages of data into 1 excel page. So when I open up the excel file all 2730 listings will be on 1 page rather than seperated over 78 pages. Do the same thing for the other 2 excel files. Excel file #2 has 113 pages each with 35 listings on each worksheet. Would like all 113 pages combined into 1 page. File #3 has 137 pages with 35 listings on each worksheet. All of the worksheets are formatted the same way. I just have no clue how to combine them. I will provide the 3 excel files, you send me back 1 excel file with all of the information from all 3 files in 1 excel database. So I should be able to open the excel database and see a total of 11480 lines of information.