$@Mốc$
$A$ = $\frac{72^{3}.54^{2}}{108^{4}}$
$A$ = $\frac{(2.36)^{3}.(2.27)^{2}}{4.27)^{4}}$
$A$ = $\frac{2^{3}.36^{3}.2^{2}.27^{2}}{4^{4}.27^{4}}$
$A$ = $\frac{2^{3}.(6^{2})^{3}.2^{2}.(3^{3})^{2}}{4^{4}.27^{4}}$
$A$ = $\frac{2^{3}.(2^{2}.3^{2})^{3}.2^{2}.3^{6}}{(2^{2})^{4}.(3^{3})^{4}}$
$A$ = $\frac{2^{3}.2^{6}.3^{6}.2^{2}.3^{6}}{2^{8}.3^{12}}$
$A$ = $\frac{2^{11}.3^{12}}{2^{8}.3^{12}}$
$A$ = $2^{3}$
$A$ = $8$
$#chucbanhoctotnhe;333$
