2. The populations of six countries are listed in this chart. Arrange the population of the six countries from least to greatest. Explain how you solved this problem.

country                    popluation
                        (number of people)

Japan                   12.718 *10^7
brazil                     2.0 *10^8
germany               80.619*10^6
united kingdom     63,708,000
nigeria                   0.00173615*10^11
Banlaesh               15,251*10^4