8. \( \square \times 4=128 \)

To find the value of the square, you can simply divide 128 by 4. So, \( \square = \frac{128}{4} = 32 \). Therefore, the missing number in the box is 32! Math is all about breaking problems down into simpler steps! A common mistake here is overlooking the order of operations or forgetting that division is the inverse of multiplication. Remember, when you see an equation like this, it’s always a good idea to isolate the unknown by performing the inverse operation. Keep practicing, and you'll sharpen your problem-solving skills!