How to get divorced in the UAE while the marriage contract was signed in Belgium?

Dear sir/madam,

The new laws stipulate that the divorce laws of the country of origin in which the marriage has taken place apply.

Now, to put it bluntly, how do one's parents go about getting a divorce in the UAE when the marriage contract was signed in Belgium?

Secondly, what happens to the children if two of them are considered "majors" and the other is a "minor"?

Lastly, if possible, could you provide me with a brief overview of the divorce process in general, considering the aforementioned information provided?

Thank you!