Calculation: how much is the square of a divided by B * 1 / b divided by c * 1 / C divided by D * 1 / D?

Calculation: how much is the square of a divided by B * 1 / b divided by c * 1 / C divided by D * 1 / D?

The answer is very simple, equal to the square of a divided by B * 1 / b divided by c * 1 / C divided by D * 1 / d!