Evaluate the expression shown below:  $$36 \left( \frac{1}{1\times 6} + \frac{1}{6\times 11} +\frac{1}{11\times 16} + \frac{1}{16\times 21} + \frac{1}{21\times 26} + \frac{1}{26\times 31} + \frac{1}{31\times 36} \right)$$ 
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