Answer
$190\ mm$
$0.19\ m$
Work Step by Step
We use stoichiometry, making sure that all units cancel out to $mm$, to obtain:
$19\ cm \times 10\ mm/cm=190\ mm$
We use stoichiometry, making sure that all units cancel out to $m$, to obtain:
$19\ cm \times 1\ m/100\ cm= 0.19\ m$