Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_78667 ( "City" text, "1860" text, "1870" text, "1880" text, "1890" real, "1900" real, "1910" real, "1920" real )

### Question ###
What is the 1880 figure when 1860 is N/A and 1910 is 494?

### Accurate SQL ###

SELECT "1880" FROM table_78667 WHERE "1860" = 'n/a' AND "1910" = '494'