Writing values to Firebase using MIT App Inventor

I am trying to write values from MIT App Inventor to firebase.
I referred to this tutorial: https://rominirani.com/tutorial-mit-app-inventor-firebase-4be95051c325
My block diagram:

Output when I wrote the value 0 to the database:

Why is the value being displayed like this? How do I display only 0?
Desired Output:
Control: 0
Status: 0

AI2 presents the data to firebase like this: "\"0\"" in order to be able to return the data correctly to AI2 for text and lists. When you call back the data, you will just get 0.

If you really must write data to Firebase without these characters, then you can use the REST api and web component