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_name_20 (code__iata_ VARCHAR, total_cargo__metric_tonnes_ VARCHAR)
### Question:
What is the IATA code of the airport that has a Total Cargo of 1,838,894 Metric Tonnes?
### Answer:
SELECT code__iata_ FROM table_name_20 WHERE total_cargo__metric_tonnes_ = "1,838,894"