Convert from avogram to gigagram

Unit Definition (avogram)
The avogram is a unit of mass, equal to 1 gram divided by the Avogadro number.

Unit Definition (gigagram)
An SI unit of mass equal to 10E9 grams, one million kilograms, or 1 kilotonne (1000 metric tons). This unit is used in scientific contexts, such as the measurement of atmospheric emissions. One gigagram equals about 2.2046 million pounds or 1102.3 U.S. (short) tons.