CREATE TABLE table_38878 ("Place" CLOB, "Code" FLOAT, "Area  ( km 2  ) " FLOAT, "Population" FLOAT, "Most spoken language" CLOB)

What's the sum of the Area (KM 2) that's got a Population that's smaller than 90?
SELECT COUNT("Area (km 2 )") FROM table_38878 WHERE "Population" < '90'
SELECT COUNT("Area (km 2 )") FROM "table_38878" WHERE "Population" < '90'