Define a 3rd field, a calculation field with this boolean expression:
field 1 = field 2
Select Number as the result type.
Then perform a find for a 1 (True) in this third field.
Define a self join linking a new table occurrence of your table to the original like this:
YourTable::Field 1 = YourTable 2::Field 2
Perform a find on a layout based on YourTable specifying an * in YourTable 2::Field 2