How do I figure out what is stronger 5x10 2nd power or 3x10 3rd power. How much are they stronger or weaker.

5x10 2nd power = 5(10^2) = 5(10*10) = 5(100) = ?

3x10 3rd power = 3(10^3) = 3(10*10*10) = 3(1000) = ?