1. **State the problem:** Find the area of a square with side length 5. 2. **Formula:** The area $A$ of a square with side length $s$ is given by: $$A = s^2$$ 3. **Apply the formula:** Substitute $s = 5$: $$A = 5^2$$ 4. **Calculate:** $$A = 25$$ 5. **Explanation:** The area of a square is found by multiplying the length of one side by itself. Since each side is 5 units, the area is $5 \times 5 = 25$ square units. **Final answer:** The area of the square is $25$.