1.5 x 10^3, 1.4 x 10^-1, 2 x 10^3, and 1.4 x 1-^-2 from least to greatest?

The numbers from least to greatest are:

1.4 x 10^-1, 1.4 x 10^-2, 1.5 x 10^3, and 2 x 10^3.