Consider the following reactions: 
i) Glucose + ROH $\stackrel{\mathrm{dry} \mathrm{HCl}}{\to }$ Acetal $\underset{{\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2\mathrm{O}}{\overset{\mathrm{x}.\mathrm{eq}.\mathrm{of}}{\to }}$ acetyl drivative 

ii) Glucose $\stackrel{\mathrm{Ni}/{\mathrm{H}}_2}{\to }$ A $\underset{{\left({\mathrm{CO}}_3\mathrm{CO}\right)}_2\mathrm{O}}{\overset{\mathrm{y} \mathrm{eq}.\mathrm{of}}{\to }}$ acetyl derivative 

(iii) Glucose $\underset{{\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2\mathrm{O}}{\overset{\mathrm{z} \mathrm{eq}.\mathrm{of}}{\to }}$ acetyl derivative 

 The product of ‘x’, ‘y’ and ‘z’ is ____.

i) 

ii) 

The acetal compound of glucose have 4 OH groups that are replaced by acetyl group so the value of Xeq is 4. x= 4 

Hexamethanol has 6 OH groups that are replaced by acetyl group so the value of Yeq. is 6. y= 6 

Glucose have 5 OH groups that are replaced by acetyl group so the value of Zeq is 5. z= 5 

product of x.y.z = 4 X 6 X 5 = 120