Kết quả của ​(begin{aligned} A &=left[left(frac{1}{9}: frac{8}{27}right): frac{16}{48}right] cdot frac{81}{128} end{aligned}) là:

 (begin{aligned} A &=left[left(frac{1}{9}: frac{8}{27}right): frac{16}{48}right] cdot frac{81}{128} \ &=left[left(frac{1}{9} cdot frac{27}{8}right): frac{16}{48}right] cdot frac{81}{128} \ &=left(frac{3}{8}: frac{16}{48}right) cdot frac{81}{128} \ &=frac{3}{8} cdot frac{48}{16} cdot frac{81}{128} \ &=frac{3.48 .81}{8.16 .128} \ &=frac{3.3 .16 .81}{8.16 .128} \ &=frac{3.3 .81}{8.128} \ &=frac{729}{1024} . end{aligned})