`\text{Ta có :}`
`+) 4 . 1024 = 16 . 256 = 4096`
`=> 4/16 = 256/1024 ; 4/256 = 16/1024 ; 16/4 = 1024/256 ; 256/4 = 1024/16`
`+) 4 . 256 = 16 . 64 = 1024`
`=> 4/16 = 64/256 ; 4/64 = 16/256 ; 16/4 = 256/64 ; 64/4 = 256/16`
`+) 16 . 1024 = 64 . 256 = 16384`
`=> 16/64 = 256/1024 ; 16/256 = 64/1024 ; 64/16 = 1024/256 ; 256/16 = 1024/64`
