\[\boxed{\mathbf{487.}}\]
\[46\ :2 = 23\]
\[39\ :3 = 13\]
\[64\ :2 = 32\]
\[63\ :3 = 31\]
\[26\ :2 = 13\]
\[44\ :4 = 11\]
\[48\ :2 = 24\]
\[82\ :2 = 41\]
\[66\ :3 = 22\]
\[84\ :4 = 21\]
\[99\ :3 = 33\]
\[55\ :5 = 11\]