How to use basic arithmetical operators in Korn shell or ksh

New to Unix or simply interested in learning more about the Korn shell? In this installment from his series of videos dedicated to the fundamentals of using the Korn Unix shell, or "ksh," YouTube user bjamesm70 discusses the ins and outs of using arithmetical operators. More specifically, this episode presents a survey of the basic math that the Korn shell provides–addition, subtraction (-), multiplication (*), simple division (/), and remainder (%). (NB: Most Korn shell versions only allow integer math.)