Before waxing, avoid applying deodorants, sprays, or oil as they can make the skin slippery and interfere with the wax adhering to the hair, reducing its effectiveness.
On the day of her examination, Riya sharpened her pencil from both ends as shown below. 
The diameter of the cylindrical and conical part of the pencil is 4.2 mm. If the height of each conical part is 2.8 mm and the length of the entire pencil is 105.6 mm, find the total surface area of the pencil.