Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_11780179_1 (gdp_per_capita__nominal_ VARCHAR, gdp__nominal_ VARCHAR)
### Question:
How many countries has a gdp (nominal) of $29.9 billion?
### Answer:
SELECT COUNT(gdp_per_capita__nominal_) FROM table_11780179_1 WHERE gdp__nominal_ = "$29.9 billion"