1. The original expression is $\frac{n \times n + n}{n}$. 2. The term $n \times n$ is the multiplication of $n$ by itself, which is defined as $n^2$. 3. So, $n \times n$ is rewritten as $n^2$ to simplify the expression. 4. This is why the expression becomes $\frac{n^2 + n}{n}$. 5. In summary, $n^2$ means $n$ multiplied by $n$, which is the same as $n \times n$.