The result of your conversion between fanega and cawney appears here
To convert between Fanega and Cawney you have to do the following:
First divide 6430 / (4/3) * (0.09290304*43560) = 1.1916657
Then multiply the amount of Fanega you want to convert to Cawney, use the chart below to guide you.
Symbol: fanega
No description
Symbol: cawney
No description