What is x when 57 divided by x equals 4?

To find the answer, just divide the dividend by the quotient: 57 ÷ 4 = 14.25

To prove this, let's compute 57 divided by 14.25: $\frac{57}{14.25} = 4$

How does it work?

Asking what the value of x could be when 57 divided by x gives a result of 4, is equivalent to solving the following equation:

$\frac{57}{x} = 4$

Multiply both sides by x: $\frac{57 x}{x} = 4 x$
$\frac{57 x}{x}$ is equivalent to $\frac{x}{x} \times 57$ , which simplifies to $1 \times 57$ (or just $57$ ).
Thus, the equation becomes: $57 = 4 x$
To find x, divide both sides by 4: $\frac{57}{4} = \frac{4 x}{4}$
Which gives, after simplification: $14.25 = x$ (or $x = 14.25$ )

So, if the dividend is 57 and the quotient is 4, the divisor is 14.25.