In the figure given below, $\mathit{A}\mathit{B}\mathit{C}\mathit{D}$ is a rectangle. $\mathit{A}\mathit{B}=14\mathrm{cm},\mathit{B}\mathit{C}=7\mathrm{cm}$ . From the rectangle, a quarter circle $\mathit{B}\mathit{F}\mathit{E}\mathit{C}$ and a semicircle DGE are removed. Calculate the area of the remaining piece of the rectangle. $($ Take $\mathit{\pi }=22∕7)$