\[\boxed{\mathbf{47.}}\]
\[316 = 300 + 10 + 6\]
\[528 = 500 + 20 + 8\]
\[635 = 600 + 30 + 5\]
\[949 = 900 + 40 + 9\]
\[777 = 700 + 70 + 7\]
\[180 = 100 + 80\]
\[340 = 300 + 40\]
\[209 = 200 + 9\]
\[805 = 800 + 5\]
\[490 = 400 + 90\]