Very sensitive with higher powers
5234 raised to 7th power, 5E3 to 7, 5 to 7 E21 5 cubed is about 100 so maybe E5 so E26.
maybe using powers of 2 such as 5^7 = 10^7/ 2^7 and 2^7 is 128 so about 100 so 10^5 is an overestimate and 10^4 is underestimate but closer to 10^5.
Units are denoted with powers.
Comparing feet to inches at different powers
The ability to estimate the right power of 10 gives a great sense of appropriate numbers in a context