### Teorija

Ārs ir $$100$$ reižu lielāks par kvadrātmetru.
Hektārs ir $$100$$ reižu lielāks par āru.
$\begin{array}{l}1\phantom{\rule{0.147em}{0ex}}a=100\phantom{\rule{0.147em}{0ex}}{m}^{2}\\ 1\phantom{\rule{0.147em}{0ex}}\mathit{ha}=100\phantom{\rule{0.147em}{0ex}}a\\ 1\phantom{\rule{0.147em}{0ex}}\mathit{ha}=10\phantom{\rule{0.147em}{0ex}}000\phantom{\rule{0.147em}{0ex}}{m}^{2}\\ 1{\phantom{\rule{0.147em}{0ex}}m}^{2}=\frac{1}{100}\phantom{\rule{0.147em}{0ex}}a\\ 1\phantom{\rule{0.147em}{0ex}}a\phantom{\rule{0.147em}{0ex}}=\phantom{\rule{0.147em}{0ex}}\frac{1}{100}\phantom{\rule{0.147em}{0ex}}\mathit{ha}\\ 1\phantom{\rule{0.147em}{0ex}}{m}^{2}=\frac{1}{10\phantom{\rule{0.147em}{0ex}}000}\phantom{\rule{0.147em}{0ex}}\mathit{ha}\end{array}$
Interesanti, ka katra laukuma vienība, ņemot pēc kārtas, atšķiras no nākamās $$100$$ reižu:
${\mathit{km}}^{2}\stackrel{:100}{⟶}\mathit{ha}\stackrel{:100}{⟶}a\stackrel{:100}{⟶}\phantom{\rule{0.147em}{0ex}}\phantom{\rule{0.147em}{0ex}}{m}^{2}\stackrel{:100}{⟶}\phantom{\rule{0.147em}{0ex}}{\mathit{dm}}^{2}\stackrel{:100}{⟶}\phantom{\rule{0.147em}{0ex}}{\mathit{cm}}^{2}\stackrel{:100}{⟶}\phantom{\rule{0.147em}{0ex}}{\mathit{mm}}^{2}$
${\mathit{mm}}^{2}\stackrel{\cdot 100}{⟶}\phantom{\rule{0.147em}{0ex}}{\mathit{cm}}^{2}\stackrel{\cdot 100}{⟶}{\mathit{dm}}^{2}\stackrel{\cdot 100}{⟶}{m}^{2}\stackrel{\cdot 100}{⟶}\phantom{\rule{0.147em}{0ex}}a\stackrel{\cdot 100}{⟶}\phantom{\rule{0.147em}{0ex}}\mathit{ha}\stackrel{\cdot 100}{⟶}\phantom{\rule{0.147em}{0ex}}{\mathit{km}}^{2}\phantom{\rule{0.147em}{0ex}}$