I haven't run into a situation like that, but if I did, I'd be doing mental math like you. `dut` would only be useful as a (quicker) replacement for `du` for te

I haven't run into a situation like that, but if I did, I'd be doing mental math like you. `dut` would only be useful as a (quicker) replacement for `du` for telling you how large the source of a `cp -r` is.