How to multiply excel values?

I have some numbers in an excel column(column A), i.e- 5,4,6, etc. And I want to multiply all those numbers by a particular number i.e-8 or 7 or 5 etc. and print the result in column B of the respective cell.
How do I do that?
Thank you

Do you know in advance by which numbers you need to multiply the values in column A? You can just use formulas in Excel for this.