WITH TotalManDis AS (
    select 
        MIN(LAT_N) AS min_latn,
        MIN(LONG_W) AS min_longW,
        MAX(LAT_N) AS max_latn,
        MAX(LONG_W) AS max_longw
    from STATION
)
SELECT 
    CAST(ABS(min_latn - max_latn) + ABS(min_longW - max_longw) AS DECIMAL(10,4))
FROM TotalManDis;