What is the equation for the law of universal gravitation?

Newton's law of Universal Gravitation says that one particle attracts the rest of every other particle in the universe using a force that is directly equivalent to the product of their masses and inversely equivalent to the square of the distance between them.

Equation for law of Universal Gravitation is:

F = G. m₁ m₂ / r²

Where, m₁, m₂ = masses of the object
r = distance between them
G = Gravitational Constant (6.67 * 10⁻¹¹ m³ Kg⁻¹ s⁻²

Hope this helps!