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3/5 of 4/7 of 5/9 of 21/24 of 504 = ?

Answer:

Explanation:

$\frac{3}{5}[\frac{4}{7}{\frac{5}{9}(\frac{21}{24}\times504)}]$
$=\frac{3}{5}[\frac{4}{7}{\frac{5}{9}(441)}]$
$=\frac{3}{5}[\frac{4}{7}{245}]$
$=\frac{3}{5}[140]=84$