Looking for either the correct expression or

I measured the length of a curve and used the perimeter attribute and multiplied that by a custom attribute amount, gave me the value of 3 as an attribute. I then wanted to group by range with that value of 3 as the end value, however I assume because it's an attribute; not a variable it won't let me use the value. Is it possible to translate an attribute value to a local variable value?

To use geometry attributes in parameters, you can take advantage of point(), vertex(), prim(), detail()expression functions [www.sidefx.com].