Find the Equivalent Expression: 3×(20+3)×(20+5)

Let's consider that each set of parentheses represents a number.

That is, if we solve the exercises within the parentheses, we will get a multiplication exercise of three numbers. We can't simplify the 3 so it does not get factored.

We solve each of the exercises within the parentheses to reveal what the numbers are:

$20+3=23$

$20+5=25$

That is, the exercise we obtained is the multiplication between three numbers:

$3\times23\times25$