\[\boxed{\mathbf{2}\mathbf{.}\mathbf{108}}\]
\[XD = 136\ см.\]
\[XM = XD - 9 = 136 - 9 =\]
\[= 127\ см.\]
\[MY = XM - 27 = 127 - 27 =\]
\[= 100\ см.\]
\[DY = DX + XM + MY =\]
\[= 136 + 127 + 100 =\]
\[= 263 + 100 = 363\ см.\]
\[Ответ:363\ см.\]