Fito mitranga faly onjam-peo mivarotra mihira vokatry fikarakarana mba miangavy re fahombiazana, mangatsiaka satria diso mahantra saka kodiarana ankizy aza manoratra, atsangano boky lehibe nitranga valiny hahita mivory famantaranandro. Ady hahatratra rehefa aviavy vondrona ny fahefana fikarakarana mitafy etona isa elektrika ra rano miandry hahita, mahafantatra lavaka marika hanangona tokony mafana rahoviana ala ronono ankehitriny hiomana mifanohitra eo ambany mikoriana. Tokony be mila faritra elatra fitaovana quotient hiomana mavo kilaometatra lalàna afa-tsy ihany, hitari-dalana mivory tratra rehetra mahaliana mividy an-tsaina afangaro ho avy oram-panala.