CREATE TABLE table_77800 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the grid total for ralf schumacher racing over 53 laps?
SELECT SUM("Grid") FROM table_77800 WHERE "Driver" = 'ralf schumacher' AND "Laps" > '53'
SELECT SUM("Grid") FROM "table_77800" WHERE "Driver" = 'ralf schumacher' AND "Laps" > '53'