\[\boxed{\mathbf{456.}}\]
\[20 \cdot 9 = 180\]
\[40 \cdot 3 = 120\]
\[60 \cdot 2 = 120\]
\[50 \cdot 5 = 250\]
\[30 \cdot 8 = 240\]
\[70 \cdot 6 = 420\]
\[6 \cdot 60 = 360\]
\[2 \cdot 80 = 160\]
\[8 \cdot 40 = 320\]
\[4 \cdot 90 = 360\]
\[60 \cdot 5 = 300\]
\[80 \cdot 5 = 400\]