The numbers are being imported into the spreadsheet as text not numbers.
If you try and do local calculation or format the cells as a number, the numbers will probably show with a proceeding quote mark indicating they are stored as text not as a number.
Note also the numbers are not aligning right.
When the quote mark is showing you can delete it to convert the cell to a number.
Or more efficiently you can use a spreadsheet function to convert the text to a number. See Copy and paste - #4 by Patch