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

### Instruction:
Johnson owns a hectare cornfield that can yield 80 corn every two months, while his neighbor owns a two-hectare cornfield and each hectare can yield twice the amount as Johnson. How much corn can they harvest altogether after six months?

### Response:
Each hectare of Johnson's neighbor can yield 80 x 2 = <<80*2=160>>160 corns every two months.
So, the neighbor's two-hectare cornfield can yield a total of 160 x 2 = <<2*160=320>>320 corns every two months.
They yield a total of 80 + 320 = <<80+320=400>>400 corns every two months.
Therefore, they can harvest 400 x 3 = <<400*3=1200>>1200 corns altogether.
#### 1200