Amazonas (Brazil) is 12 times larger than Arkansas (USA).
Amazonas is a state of Brazil, located in the northwestern corner of the country. It is the largest Brazilian State by area and the 9th largest country subdivision in the world. Neighbouring states are Roraima, Pará, Mato Grosso, Rondônia, and Acre. It also borders Peru, Colombia and Venezuela. Wikipedia
Arkansas is a state located in the Southern region of the United States. Its name is of Siouan derivation, denoting the Quapaw Indians. The state's diverse geography ranges from the mountainous regions of the Ozark and the Ouachita Mountains, which make up the U.S. Wikipedia