1. **State the problem:** We need to solve the division problem $128 \div 4$. 2. **Recall the division formula:** Division is the process of determining how many times the divisor fits into the dividend. Here, the dividend is 128 and the divisor is 4. 3. **Perform the division:** $$128 \div 4 = 32$$ 4. **Explanation:** Dividing 128 by 4 means splitting 128 into 4 equal parts. Each part has 32 units. 5. **Final answer:** $$\boxed{32}$$