Solve the Square Root Equation: Finding the Number Under √☐ = 8

To solve the problem $\sqrt{☐} = 8$, we follow these steps:

• Step 1: Identify the equation given, which is $\sqrt{☐} = 8$.

• Step 2: To solve for $☐$, we need to eliminate the square root. We do this by squaring both sides of the equation:

  $(\sqrt{☐})^2 = 8^2$

• Step 3: Simplify both sides:

  On the left, $(\sqrt{☐})^2$ simplifies to $☐$, and on the right, $8^2 = 64$.

• Step 4: This gives us the equation $☐ = 64$.

Thus, the value of $☐$ is 64.

Therefore, the solution to the problem is $64$.