How many times the vapour density of glucose is multiple of vapour density of formaldehyde?

Empirical formula of glucose is same as that of formaldehyde.

$$\begin{gathered} \frac{\mathrm{Vapor} \mathrm{density} \mathrm{of} \mathrm{Glucose}}{\mathrm{Vapor} \mathrm{density} \mathrm{of} \mathrm{formaldehyde}}=\frac{2\times \mathrm{Molecular} \mathrm{weight} \mathrm{of} \mathrm{glucose}}{2\times \mathrm{Molecular} \mathrm{weight} \mathrm{of} \mathrm{formaldeyde}} \\ \Rightarrow \frac{2\times 180}{2\times 30}=6 \end{gathered}$$