I counted and got the exact same numbers from the first photo in the article: 8x19x102. No helper software needed, on a small phone screen.
Though having an app handy might make sense sometimes.
Though having an app handy might make sense sometimes.
Once you realise that the error bars are small (and it was mostly intuitive for me, probably looking at counting up to a hundred, so a few percent off is not a big deal), you stop worrying about the uncertainty as much ;-)