Question

What number multiplied by itself 2 times equals 49

Answer 1

You're basically looking for the square root of 49. In fact, if a number $x$ gives $y$ when multiplied by itself two times, then you have $x^2 = y$, which also means that $x$ is the square root of $y$, i.e. $x = \sqrt{y}$

In your case, the answer is 7, because you have

$\sqrt{49}=7 \iff 7^2 = 49$

which is indeed true