Answer:
1208
Step-by-step explanation:
There are 18 sections that have 478 seats each:
478 * 18 = 8604
If there are 39 sections in total, there are 21 remaining which have 292 seats each:
292 * 21 = 6132
To find the total number of seats, add the numbers:
8604 + 6132 = 14736
To find the number of empty seats, subtract the number of filled seats from the total seats:
14736 - 13528 = 1208