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