The result of your conversion between cawney and tarea appears here
To convert between Cawney and Tarea you have to do the following:
First divide (4/3) * (0.09290304*43560) / 628.8 = 8.58112049
Then multiply the amount of Cawney you want to convert to Tarea, use the chart below to guide you.
Symbol: cawney
No description
Symbol: tarea
No description