Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_204_488 ( id number, "order in\nposition" number, "president of\nthe republic" text, "length of\nthe presidential\naction" text, "rank by\nlength\nof term(s)" number, "notes" text )

### Question ###
how long was the longest presidential action by any president of finland ?

### Accurate SQL ###

SELECT "length of\nthe presidential\naction" FROM table_204_488 ORDER BY "rank by\nlength\nof term(s)" LIMIT 1