I cant see why you would want this is a calc but there are a few ways. I am not going to list them all.
You can create a calc that returns the value 23. Then you can have a self join relationship from this field to the Opertaion serial field. Now you can just have a second calc use Count ( SelfJoin::Opertaion serial ).
Another way may be to create a calc forumula of: Opertaion serial = 23. Then you can use a summary field of sum or calc to add up that field.