# Exercise: Gravitational Force

Let's calculate the gravitational force between two masses!

## We'll cover the following

## Problem Statement

Gravitational force is the attractive force that exists between two masses. It can be calculated by using the following formula:

$\dfrac{G Mm}{r^2}$

where *G* is the gravitational constant, *M* and *m* are the two masses, and *r* is the distance between them.

You must implement this equation in Python to calculate the gravitational force between Earth and the moon.

### Sample Input

G = 6.67 * 10^{-11}

M_{Earth} = 6.0 * 10^{24}

m_{Moon} = 7.34 * 10^{22}

r = 3.84 * 10^{8}

### Sample Output

F_{G} = 1.99 * 10^{20}

## Coding Challenge

All the values have already been given to you. You must write the formula in Pythonic syntax and store the answer in the `grav_force`

variable.

If you feel stuck, refer to the solution review in the next lesson.

Good luck!

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