CREATE TABLE table_51704 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the grid total for david coulthard with over 45 laps?
SELECT COUNT("Grid") FROM table_51704 WHERE "Driver" = 'david coulthard' AND "Laps" > '45'
SELECT COUNT("Grid") FROM "table_51704" WHERE "Driver" = 'david coulthard' AND "Laps" > '45'