How to concatenate two numeric fields as strings?

I have two number fields (year and quarter) I want to concatenate. However, Webi takes the concatenation function and uses it as a mathematical operator:

Data:

Variable (FYFQ):

=Concatenation([FY];[FQ])

Expected Output:

However what I got was:

It seems it took the two Number fields and added them when I wanted them to be concatenated. Should I convert the FY and FQ fields into non-numeric/non-interger strings before I apply the Concatenation() function? How do I do this? I don't see a ToString() function?

Thanks!