SELECT MAX("Grid") FROM table_57792 WHERE "Driver" = 'piercarlo ghinzani' AND "Laps" > '3'
What is the highest numbered grid for piercarlo ghinzani with over 3 laps?
CREATE TABLE table_57792 (
    "Driver" text,
    "Constructor" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real
)