มีกี่รอบเมื่อกระปุกเกียร์หมดเวลา/เลิกใช้?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many laps were there when time/retired was gearbox?It is not neccessary to use all the tables.
 table_51481:  "Driver" [ text]  "Constructor" [ text]  "Laps" [ real]  "Time/Retired" [ text]  "Grid" [ real] 
SELECT SUM("Laps") FROM table_51481 WHERE "Time/Retired" = 'gearbox'