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?
Each hectare of Johnson's neighbor can yield 80 x 2 = 
<gadget id="calculator">80*2</gadget>
<output>160</output>
160 corns every two months.
So, the neighbor's two-hectare cornfield can yield a total of 160 x 2 = 
<gadget id="calculator">160*2</gadget>
<output>320</output>
320 corns every two months.
They yield a total of 80 + 320 = 
<gadget id="calculator">80+320</gadget>
<output>400</output>
400 corns.
Therefore, They can harvest 400 x 3 = 
<gadget id="calculator">400*3</gadget>
<output>1_200</output>
1200 corns altogether.

<result>1_200</result>