Thank you for your question!
In each of Verbal Reasoning, Quantitative Reasoning, Abstract Reasoning and Decision Making, you will be awarded a raw score depending on the number of correct answers given. This score is then scaled into a score between 300 and 900 points. You can therefore score between 1200 and 3600 points overall.
So 673 is your average score across the sections – and this is a good score, well done! You can find out more about UKCAT scores and how they work here: https://www.themedicportal.com/application-guide/ukcat/
Hope this helps! 🙂