The result of your conversion between square gigameter and cawney appears here
To convert between Square Gigameter and Cawney you have to do the following:
First divide 1.0E+18 / (4/3) * (0.09290304*43560) = 185329036100374.
Then multiply the amount of Square Gigameter you want to convert to Cawney, use the chart below to guide you.
Symbol: gm2
No description
Symbol: cawney
No description