The result of your conversion between dekajoule and gigacalorie [I.T.] appears here
To convert between Dekajoule and Gigacalorie [I.T.] you have to do the following:
First divide 10 / 4186800000 = 0.
Then multiply the amount of Dekajoule you want to convert to Gigacalorie [I.T.], use the chart below to guide you.