It is known that $$\pi = 3.14159...$$. Find $\underbrace { (\left\lfloor \pi \right\rfloor +\left\lceil \pi \right\rceil )\quad +\quad (\left\lfloor \pi \right\rfloor +\left\lceil \pi \right\rceil )\quad +\quad ... }_{ \left\lfloor \pi \right\rfloor }$ $+$ $\underbrace { (\left\lceil \pi \right\rceil +\left\lfloor \pi \right\rfloor )\quad +\quad (\left\lceil \pi \right\rceil +\left\lfloor \pi \right\rfloor )\quad +\quad ... }_{ \left\lceil \pi \right\rceil }$