How to copy a formula without the link

I know this is a very basic question, but one that has bugged me for too long, and google doesn't ever give me the correct answer.

So how do I copy a formula from one spreadsheet to another without the formula automatically linking back to the original location.

=LOOKUP(A21,'C:\Users\north\Documents\Reports\10-9-18\[Producer Report 10-9-18.xlsm]BackEnd'!$F:$G,'C:\Users\north\Documents\Reports\10-9-18\[Producer Report 10-9-18.xlsm]BackEnd'!$E:$E)

I'm sure it frustratingly easy, when you know how.

Thx

I just put an apostrophe in front of the equal sign and it becomes text and just copy it all.

Yes, it really is that simple. Thx