CREATE TABLE table_65477 ("School" TEXT, "Location" TEXT, "Mascot" TEXT, "Enrollment" FLOAT, "IHSAA Class" TEXT, "County" TEXT)

What is the enrollment number for Rockville?
SELECT COUNT("Enrollment") FROM table_65477 WHERE "Location" = 'rockville'
SELECT COUNT("Enrollment") FROM "table_65477" WHERE "Location" = 'rockville'