#+COLUMNS: %50ITEM(Task) %Days %5Effort({Hours}){+}
#+STARTUP: odd showall

#+BEGIN: columnview :maxlevel 3 :id ddb38905-fcbb-473b-99ef-d35194604ffa
| Task | Days | {Hours} |
|------+------+---------|
|      |      |         |
|      |      |         |
#+TBLFM: $2 = ceil($3 / 8)
#+END:

* project
*** Total of Effort
    :PROPERTIES:
    :ID:       ddb38905-fcbb-473b-99ef-d35194604ffa
    :END:
***** feature
******* TODO task
        :PROPERTIES:
        :Effort:   7
        :END: