(123x456-23x46)x(12x9-4x27)
=.......x.....
=0
( 123 * 456 - 23 * 46) * (12 * 9 - 4 * 27) = 55030 * 0
= 0.
( 123 . 456 - 23 . 46 ) . ( 12 . 9 - 4 . 27)
= ( 123 . 456 - 23 . 46 ) . ( 108 - 108 )
= ( 123 . 456 - 23 . 46 ) . 0
= 0
(123x456-23x46)x(12x9-4x27)
=(123x456-23x46)x(108-108)
=(123x456-23x46)x0
=0