Background
My business teacher on his board wrote the equation $TP\div TM = P_m$ (In this equation, $T=\text{Time in years}$, $P=\text{Principle}$, $M=\text{Time in months}$, and $P_m=\text{Monthly Payment}$.) This equation is being used to calculate the monthly payment for a simple interest equation.
My teacher wrote the equation as $(TP)\div(TM)=P_m$ in other places on the board
My teacher says that the $\div$ operator separates the equation into two terms; $TP$ and $TM$. I think that the expression can be represented as a single terms; $\frac{TP}{TM}$ (And I was taught the separator of terms was a $+$ or $-$. Which of these interpretations is correct?
Edit: I know this is a rather trivial topic, but my teacher is very insistent and I am not one to just deny what my teacher says without knowing for sure.