You continue this kind of eyeballing it as you go.
Your last dutch braid is just over the ear, then you braid like normal except you continue to braid pulling pieces over instead of under.
Finish off with an elastic.
Start the next braid at the part again and dutch braid all the way down.
Finish off with an elastic.
Next start to pull on the braid to loosen and pancake the braid to make it look fuller.
Start on the second braid.
When the are both as full as you like, take the first braid closest to the face and bring under the second braid and add to a low pony tail.
Take the second braid and wrap it around the pony tail two times.
Pull the tail through wrapped hair like a knot on the bottom side.
Remove the elastic.
Pin into place using 2-3 pins.