Long Division With Missing Digits

Logic Level 1

\[ \LARGE{ \require{enclose} \begin{array}{rll} \phantom{0}\ \boxed{\phantom{0}} && \\[-2pt] \boxed{{\phantom{0}}} \ \boxed{{\phantom{0}}}\ \enclose{longdiv}{\boxed{\phantom{0}} \ \boxed{\phantom{0}}}\kern-.2ex \\[-2pt] \underline{\boxed{2} \ \boxed{3}} && \\[-2pt] \boxed{{4}} \end{array} } \]

Find the sum of all (individual) missing digits that satisfy the long division above.