piss easy, you see those two big holes in the hub?
behind them will be 4 nuts (you need to spin the hub to get at them all) that bolt a flange plate to the axle flange.
undo all of them, then pull the axle out, this will invilve either using a slide hammer or a brake drum.
be careful as the brake shoes might try to fall off.
how did you snap the stud?