 that $5 \times 8 \times X \times n = 7!$. We know that $7!$ is equal to $7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1$, which is 5040.

So, we can set up the equation as follows:

$5 \times 8 \times X \times n = 5040$

To solve for $X$, we divide both sides of the equation by $5 \times 8 \times n$:

$\frac{5 \times 8 \times X \times n}{5 \times 8 \times n} = \frac{5040}{5 \times 8 \times n}$

Simplifying, we have:

$X = \frac{5040}{40n}$

Since we are given that the value of $n$ that satisfies the equation is 63, we can substitute that into the equation:

$X = \frac{5040}{40 \times 63}$

Simplifying further, we have:

$X = \frac{5040}{2520}$

$X = 2$

Therefore, the value of the unknown variable $X$ is 2.
The answer is: 2
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
For what value of $n$ is $5 \times 8 \times X \times n = 7!$? The answer is 63. What is the value of unknown variable X?

### Answer:
