Quotient_Ring_of_Integers_and_Principal_Ideal_from_Unity

Let $\left({\Z, +, \times}\right)$ be the integral domain of integers. Let $\left({1}\right)$ be the principal ideal of $\left({\Z, +, \times}\right)$ generated by $1$. The quotient ring $\left({\Z, +, \times}\right) / \left({1}\right)$ is isomorphic to the null ring.