Geometry Level pending

Right triangle $$XYZ,$$ with hypotenuse $$YZ,$$ has an incircle of radius $$\dfrac{3}{8}$$ and one leg of length 3. Find the area of the triangle.

The answer can be expressed in the form of $$\dfrac{a}{b}$$, where $$a$$ and $$b$$ are coprime positive integers. Enter $$a+b$$.

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