Calculate：$$\frac{3\dfrac{1}{3}\times 1.9+19.5\div 4\dfrac{1}{2}}{\dfrac{62}{75}-0.16}\div \frac{3.5+4\dfrac{2}{3}+2\dfrac{2}{15}}{0.5\times \left( 1\dfrac{1}{20}+4.1 \right)}$$． 
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