CREATE TABLE table_53324 ("Unit" TEXT, "Reactor Type" TEXT, "Net Capacity" TEXT, "Gross Capacity" TEXT, "Construction Start" TEXT, "Grid Connection" TEXT, "Commercial Operation" TEXT, "Status" TEXT)

What is the gross capacity of the unit that started commercial operation on August 28, 1987?
SELECT "Gross Capacity" FROM table_53324 WHERE "Commercial Operation" = 'august 28, 1987'
SELECT "Gross Capacity" FROM "table_53324" WHERE "Commercial Operation" = 'august 28, 1987'