Simplify: \(\frac{{\left[ {\;3\frac{1}{4} \div \left\{ {1\frac{1}{4} - 0.5 \times \;\left( {2\frac{1}{2} - \;\overline {\frac{1}{4} - \frac{1}{6}} } \right)} \right\}} \right]}}{{4 \times \;\frac{1}{{12}}}}\)