Can you arrange a standard set of $28$ dominoes into a rectangle of $7\times8$, where each of the 8 rows sum to $21$ and each of the 7 columns sum to $24$?

[![double 6 dominoes][1]][1]

<sub>Image from [WikiPedia][2].</sub>

Or, alternatively, pack the dominoes into their $7\times4\times2$ box, with equal rows and stacks.

  [1]: https://i.sstatic.net/sMx5l.png
  [2]: https://en.wikipedia.org/wiki/Dominoes#Tiles_and_suits