The triangle $ABC$ has vertices such that $AB = 3$, $BC = 4$, and $AC = 5$. The inscribed circle is tangent to $AB$ at $C'$, $BC$ at $A'$, and $AC$ at $B'$. The ratio between the area of the triangles $A'B'C'$ and $ABC$ is given in the form \frac{k}{m}. Please find the value of k + m.

Let's think step by step and output the final answer within \boxed{}.
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