Dictionaries and airtable format

Hi guys I have a problem with value formats:

I am using dictionaries to make a look up and I made tests with string values and numeric values and all works good But when I get values from airtable always is string even if my field type in airtable is numeric.

My questions are: The dictionaries with airtable have a problem or just is the format from airtable?

Here are my blocks to do the test:

You can see that airtable return me the number 4 but is in string format, how can I change that? I repiet that in airtable the field type is numeric.

someone can help me please?