咁當然我係用緊16：10既Macbook
Of course, I use a 16:10 Macbook

Cantonese Sentence Breakdown

咁 gam3
so (Cantonese)
Mandarin equivalent: 这样zhèyàng [这样], like this
當然 dong1 jin4
(adverb) absolutely
我 ngo5
I
me
my
us
we
our
self
係 hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
用緊 yung6 gan2
using
既 gei3
already