How do you multiply a field value by the value's count?

[ryan_t_gavin]

For example, I have the field "received_files" with 3 values: 1, 2, and 3.

I already ran "convert num(received_files)" as the values are always numerical values. I want to take those 3 numbers (1, 2, and 3) and multiply them by their count. Afterwards, I want to add them all up (sum).

How do I do this?