Question

Calculați
$\frac{36}{1} \times ( \frac{1}{1} + ( \frac{1}{54} + \frac{5}{72} + \frac{1}{108} ) \div ( \frac{1}{1} - \frac{1}{9} ))$
Plz...Am nevoie de ajutor..
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Answer 1

36/1×[1/1+(1/54+5/72+1/108):(1/1-1/9)]=36/1×(1+7/72:8/9)=36/1×(1+7/72×9/8)=36/1×(1+7/8×1/8)=36/1×(1+7/64)=36/1×71/64=9/1×71/64=639/16