Identical boards in the shape of an isosceles trapezoid are joined together as shown in the figure to form a rectangular frame with a short side of 16 cm and a long side of 26 cm on the outside.
A picture is placed inside the frame of this frame such that the entire picture is visible and completely covers the inside of the frame.\\
Accordingly, what is the area of this picture placed in $\mathbf { c m } ^ { \mathbf { 2 } }$?\\
A) 336\\
B) 312\\
C) 288\\
D) 264\\
E) 240