Perimeter of Rectangular Garden

A rectangular garden needs to be fenced off for a school project. The length of the garden is represented by the variable $L$, and the width by the variable $W$. The perimeter of a rectangle can be calculated using the formula:

$$P = 2L + 2W$$

If the length of the garden is 10 meters more than its width, express the perimeter in terms of the width $W$. What is the perimeter of the garden if the width is 12 meters?