CREATE TABLE table_203_416 (id DECIMAL, "school name" TEXT, "city" TEXT, "grades" TEXT, "establishment" DECIMAL, "charter" TEXT)

how long has kalakaua middle school been erected ?
SELECT present_ref - (SELECT "establishment" FROM table_203_416 WHERE "school name" = 'kalakaua middle school')
SELECT "present_ref" - (SELECT "establishment" FROM "table_203_416" WHERE "school name" = 'kalakaua middle school')