Find the area (EXPLAIN YOUR ANSWER AND CORRECT ANSWER FOR BRAINLYEST)
(no links)

Step-by-step explanation:
Alright,
Multiply each side by each other so,
16×5 = 80
80×4.5= 360
360× 12 = 4,320
4,320 × 21 = 86,400
The area of this figure is 86,400. I Hope this helps you ^-^ ♡