Before anyone rips into me saying 6oz/t is ridiculous, it's just an example. It might average 3oz/t (though I doubt it) which is 2.25Moz.
It's the disseminated, pervasive nature of the mineralisation that means that the grade translates to such huge numbers because from the results to date, 100% of the tonnes are mineralised and ~90% of them are mineralised at ore grades.