CREATE TABLE table_name_29 (gdp__billion_us$_ VARCHAR2, gdp_per_capita__us$_ VARCHAR2)

What is the GDP (billion US$) of the country that has a GDP per capita (US$) of 8,861?
SELECT gdp__billion_us$_ FROM table_name_29 WHERE gdp_per_capita__us$_ = "8,861"
SELECT "gdp__billion_us$_" FROM "table_name_29" WHERE "8,861" = "gdp_per_capita__us$_"