A landscaping company is hired to construct a triangular garden in a park. In order to plan the dimensions of the garden, the company created a scale model of the garden. The three sides of the scale model are 9 inches, 12 inches, and
18 inches. If the largest side length of the garden will be 24 feet, what will be the perimeter, in feet, of the completed garden?
A : 39
B : 52
C : 81
D : 144