cut off the first 7 characters from the field value and write the rest in the additional field

Good day It is necessary to cut off part of the text in front of the value of the additional field, and write the remainder in the additional field. The field has a certain standard format, for example PA000003345, only the last digits change. You need to cut off 7 characters in front and write the last 4 numbers in the additional field By action Calculate and write the value in the additional field, if the conditions are met - I write with the formula trim('[fiopoluchatelya231]','PA0') , I get the value 3345, but if the value of the above field is PA000003340 , I accordingly cut off all zeros and in the additional field I get 334 , not 3340 as I need. Help, plz, what is the correct formula to specify? Is it possible that there is another action by which I can implement this? configured in the procedure https://crm.ohrana.ua/admin/shop/workflow/16/procedure/1123/?status=0 , the process for the test if necessary https://crm.ohrana.ua/admin/customorder/zakaz -klienta/3112744/edit/ Very grateful