To prevent numbers from appearing in scientific notation (e.g., 8.19986E+11, 4.94835E+11, etc.) in a spreadsheet program:
Highlight the affected cells or columns.
Right-click and choose 'Format Cells'.
Select 'Number' or 'Text' under the 'Number' tab in the dialog box.
Click 'OK' to apply the changes.
Save your file.
This process changes the display format from scientific notation to a standard number or text format.