CREATE TABLE table_21438 ("Fin. Pos" FLOAT, "Car No." FLOAT, "Driver" TEXT, "Team" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT, "Laps Led" FLOAT, "Points" TEXT)

How many drivers on the grid are called Vitor Meira?
SELECT COUNT("Grid") FROM table_21438 WHERE "Driver" = 'Vitor Meira'
SELECT COUNT("Grid") FROM "table_21438" WHERE "Driver" = 'Vitor Meira'