CREATE TABLE table_203_363 (id NUMBER, "city\ 2010 census" CLOB, "chinese" CLOB, "built-up area" NUMBER, "urban area" NUMBER, "level" CLOB, "administrative area" NUMBER, "province-level division" CLOB, "remarks" CLOB)

how many people live in the built up area of zhengzhou ?
SELECT "built-up area" FROM table_203_363 WHERE "city\n2010 census" = 'zhengzhou'
SELECT "built-up area" FROM "table_203_363" WHERE "city\n2010 census" = 'zhengzhou'