$($a$)$

What is the acceleration $($in m$/$s$2)$ of gravity on the surface of the moon?

m$/$s$2$

$($b$)$

What is the acceleration $($in m$/$s$2)$ of gravity on the surface $($or outer limit$)$ of Uranus? The mass of Uranus is $8\mathrm{.}681025$ kg and its radius is $2\mathrm{.}33107$ m$.$

m$/$s$2$