human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: City, 1860, 1870, 1880, 1890, 1900, 1910, 1920
###Question: What is the 1880 figure when 1860 is N/A and 1910 is 494?
gpt
SELECT 1880 FROM table WHERE 1860 = n/a AND 1910 = 494