The result of your conversion between cawney and square gigameter appears here
To convert between Cawney and Square Gigameter you have to do the following:
First divide (4/3) * (0.09290304*43560) / 1.0E+18 = 0.
Then multiply the amount of Cawney you want to convert to Square Gigameter, use the chart below to guide you.
Symbol: cawney
No description
Symbol: gm2
No description