Chapter 5.4, Problem 14ES

Any product of two more integers is a result of successive multiplications of two integers at a time. For instancem here are a few of the ways in which $a_1{a}_2{a}_3{a}_4$ might be computed: $\left(a_1{a}_2\right)\left(a_3{a}_4\right)$ or $\left(\left(a_1{a}_2\right)a_4\right)$ or $a_1\left(\left(a_2{a}_3\right)a_4\right)$ ., Use strong mathematical induvition to prove that any product of two or more odd integers is odd.