Multiply across the top of the unit conversion. What is the product of the numerator?

[tex]\[
\begin{array}{l|l}
24 \text{ moles } C_2H_6 & 7 \text{ moles } O_2 \\
\hline
\text{ moles } C_2H_6
\end{array} = \left[\begin{array}{l}
\text{ ? }
\end{array}\right]
\][/tex]