CREATE TABLE table_name_7 (grid INT, laps VARCHAR, driver VARCHAR)

What is the sum of grid values of driver Michael Schumacher with lap counts larger than 66?
SELECT SUM(grid) FROM table_name_7 WHERE laps > 66 AND driver = "michael schumacher"
SELECT SUM("grid") FROM "table_name_7" WHERE "driver" = "michael schumacher" AND "laps" > 66