I have created a "Parse Json" to extract the values from my CSV file. the extraction is working fine, however, I need to get only the numerical value from a particular string, to insert one of the numeric values on my SharePoint list

The Case Number returned is
I am trying to remove everything from the string but the number 03679142, which is the one I need to insert on my SharePoint list
I have tried split() and replace but can't make sense of what I am doing, I would appreciate any help