The result of your conversion between cawney and cuerda appears here
To convert between Cawney and Cuerda you have to do the following:
First divide (4/3) * (0.09290304*43560) / 3930 = 1.37297928
Then multiply the amount of Cawney you want to convert to Cuerda, use the chart below to guide you.
Symbol: cawney
No description
Symbol: cda
No description