How do I Simplify a radical expressions

Question

I'm having trouble understanding how to simplify the following radical expression.

$$\sqrt{3087}$$

Could someone please help me understand how to?

Answer 1

It' just $\sqrt{3087}=21\sqrt7$

Answer 2

$$\sqrt{3087}=\sqrt{3^2\cdot 7^3}=\sqrt{3^2}\cdot \sqrt{7^2}\cdot \sqrt{7}=3\cdot 7\cdot \sqrt{7}=21\sqrt{7}$$