$\begin{array} { r c c c l c l } 1& \times & 9 & + & 2 & = & 11 \\ 12& \times & 9 & + & 3 & = & 111 \\ 123& \times & 9 & + & 4 & = & 1111 \\ 1234& \times & 9 & + & 5 & = & 11111 \\ 12345& \times & 9 & + & 6 & = & 111111 \\ 123456& \times & 9 & + & 7 & = & 1111111 \\ 1234567& \times & 9 & + & 8 & = & 11111111 \\ 12345678& \times & 9 & + & 9 & = & 111111111 \\ \end{array}$

What is the value of:

$123456789 \times 9 + 10?$

**Note**: Can you explain what is happening?

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