\[\boxed{\mathbf{477.}}\]
\[\textbf{а)}\ 11 \cdot 6 = 66\]
\[13 \cdot 2 = 26\]
\[21 \cdot 4 = 84\]
\[23 \cdot 3 = 69\]
\[32 \cdot 2 = 64\]
\[41 \cdot 2 = 82\]
\[31 \cdot 3 = 69\]
\[24 \cdot 2 = 48\]
\[12 \cdot 4 = 48\]
\[\textbf{б)}\ 70 \cdot 3 = 210\]
\[450\ :5 = 90\]
\[180\ :9 = 20\]