The result of your conversion between dunum, dunham and square gigameter appears here
To convert between Dunum, Dunham and Square Gigameter you have to do the following:
First divide 1000 / 1.0E+18 = 0.
Then multiply the amount of Dunum, Dunham you want to convert to Square Gigameter, use the chart below to guide you.
Symbol: dunum
No description
Symbol: gm2
No description