## A perfect square number is a number that can be obtained by multiplying an integer by itself. For example, 9 is a perfect square because 3 multiplied by 3 equals 9.

To find more perfect square numbers, you can continue squaring integers. Here are some other examples:

- 16 is a perfect square because 4 multiplied by 4 equals 16.

- 36 is a perfect square because 6 multiplied by 6 equals 36.

- 49 is a perfect square because 7 multiplied by 7 equals 49.

- 64 is a perfect square because 8 multiplied by 8 equals 64.

- And so on...

Now, let's answer your second question. If you multiply two perfect square numbers together, the result will indeed always be a perfect square. This can be easily demonstrated using algebra.

Let's say you have two perfect square numbers, m and n. They can be written as m = a^2 and n = b^2, where a and b are integers.

When you multiply m and n together, you get (a^2)(b^2). Using the properties of exponents, you can simplify this expression to (ab)^2.

Therefore, the product of two perfect square numbers is (ab)^2, which means it is also a perfect square.