Tính bằng cách hợp lí nhất:
\(\left(44.52.60\right)\div\left(11.13.15\right)\)
\(=\)\(\left(4.11.4.13.4.15\right)\div\left(11.13.15\right)\)
\(=\)\(\left(4.4.4\right).\left(11.13.15\right)\div\left(11.13.15\right)\)
\(=\)\(\left(4.4.4\right)\div1\)
\(=\)\(4.4.4\)
\(=\)\(64\)