Ah, I certainly didn't get that!
The QF 744 fleet has 30 aircraft and they have about 230 Captains, 230 F/Os and nearly 400 S/Os. That indicates just shy of 1
. The 767 has 29 aircraft showing a compliment of about 180...about 1:6. I seem to recall the 737 operating at just over 1:5.
The A380 numbers will probably be close to the 744 numbers given the flying will be virtually identical.