I'm using a pre-packaged "solution" on my first project. The Hub has a summary metric, and the same summary metric in the Web Experience. The Web Experience editor has "dynamic content" and a way to write an expression (multiplying the sum of a value by a constant to convert it to "miles"). The Hub layout offers "dynamic value," and a list of "aggregation" functions for a given attribute. How do I take the result of the "sum" and convert it to miles?
I'm using arcGIS Online. I have no idea about coding.