\[\boxed{\mathbf{2.}\mathbf{140}}\]
\[x = 27:\]
\[27\ :9 = 3 + 28 = 31 + 27 =\]
\[= 58\ :2 = 29 \cdot 4 = 116.\]
\[x = 45:\]
\[45\ :9 = 5 + 28 = 33 + 27 =\]
\[= 60\ :2 = 30 \cdot 4 = 120.\]
\[x = 72:\]
\[72\ :9 = 8 + 28 = 36\ :2 =\]
\[= 18 + 47 = 65 \cdot 10 = 650.\]