To copy columns from one Excel spreadsheet to another, you need to click on the column name first in the source file. Then, open the destination file and press Ctrl+V.

That means you cannot copy an entire column by clicking a column header and copy it into an entire row; instead, you must precisely copy just the range of data.

Multiplying an entire Excel column by the results of a formula can be a little tricky, especially if the formula is complicated or subject to change.