$$
F = G \cdot \frac{m_1\,m_2}{d^2}
$$
where $G$ is the gravitational constant in
units of $
\frac{\text{N}\,\text{m}^2}{\text{kg}^2} $.
$$
G = 6.67 \times 10^{-11}\ \frac{\text{ N m}^2}{\text{kg}^2}
$$
Acceleration due to gravity
$$
a = G \cdot \frac{M}{r^2}
$$
Orbital velocity
$$
v = \sqrt{ G \cdot \frac{ M }{ r } }
$$
$M$ is the mass of the body being accelerated
towards or orbited in the above two formulas.
$r$ is the distance between the centers of the
two bodies. For the orbital velocity formula,
it is the average orbital radius.