`{(2/3)^{0} . (2/3)^{5} . 8^{10}}/4^{8}`
`= {(2/3)^{5} . (2^{3})^{10}}/(2^{2})^{8}`
`= {(2/3)^{5} . 2^{30}}/2^{16}`
`= {(2/3)^{5} . 2^{14}}/1`
`= (2/3)^{5} . 2^{14}`
`= 32/243 . 2^{14}`
`= 2^{5}/243 . 2^{14}`
`= 2^{5}.2^{14}/243`
`= 2^{19}/243`
`= 524288/243`