Multi column or table row for chapter headers?

You may use totcount package along with regtotcounter{chapter} command and then you can refer to the total chapters counts in your document by the command total{chapter}.

To apply this into your chapter title, one way is using usepackage{titlesec} to change the default title format to include the total number of chapters, and perhaps using sffamily (from what appears in your picture) as the font of your chapter title.

Assuming you are using the book class (as you didn't specify), with total of 3 chapters, you get an output like this

Full code

documentclass{book}
usepackage{titlesec}
usepackage{totcount}
regtotcounter{chapter}
%
usepackage{lipsum}
%
titleformat{chapter}[hang]{sffamilyHugebfseries}{thechapter/total{chapter}}{1em}{}

begin{document}
    chapter{Introduction}
    section{Structure}
    This book consists of total{chapter} chapters.
%   
    chapter{Finding The Leaks in Your Funnel}
    section{Leaks}
    lipsum
%
    chapter{Finding Something Else}
    section{Something}
        lipsum
end{document}

---

EDIT

If you want multi-line numbering (with a smaller font for chapter numbering), change titleformat command to

titleformat{chapter}[hang]{sffamilybfseries}{raisebox{2ex}{normalsize parbox[t][0cm]{0cm}{ thechapter  /  total{chapter} }}}{3em}{Huge}

You may change the parameters of 2ex, normalsize, or Huge to your liking.