$100=10\cdot 10={10}^2$

$1000=10\cdot 10\cdot 10={10}^3$

$1\text{mln}=1000000={10}^6$

$1\text{mld}=1000000000={10}^9$

$0,001={10}^{-3}$

$0,00001={10}^{-5}$  

$1={10}^0$