CREATE TABLE table_20142 ("Ecozone" TEXT, "Area  ( km\\u00b2 ) " FLOAT, "Percentage of total area" TEXT, "Percentage of land area" TEXT, "Percentage protected" TEXT)

How large is the Boreal Shield in km2?
SELECT COUNT("Area (km\u00b2)") FROM table_20142 WHERE "Ecozone" = 'Boreal Shield'
SELECT COUNT("Area (km\u00b2)") FROM "table_20142" WHERE "Ecozone" = 'Boreal Shield'