If your patter doesn't change, you can use combination of
String.Substring Method[
^] and
String.LastIndexOf Method[
^] to find it.
For Ex - suppose the above string is stored in a variable str. Using above methods you could write something like
str.Substring(str.LastIndexOf("==="), str.IndexOf(" ") + 1);
Please note that this is just an example. Though it will give a correct output for your question, you must fine tune it based on your requirement (for ex if you have 2 or more digit numbers).
Hope this gives you an idea.