Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Cooper is building a brick fence around all four sides of his property.  Each of the four walls of his fence is 20 bricks long, 5 bricks high, and 2 bricks deep.  How many bricks does Cooper need to complete his fence?

### Response:
The total length of each wall is 20 bricks * 5 rows = <<20*5=100>>100 bricks.
The total area of each wall is 100 bricks * 2 bricks = <<100*2=200>>200 square bricks.
Since the complete fence contains four walls, the total number of bricks needed is 4 walls * 200 square bricks = <<4*200=800>>800 square bricks.
#### 800