Numbers and Patterns (2)

From the options the answer is obvious.
The number of digits in the answer would bebthe number of digits in the extreme left being added. For example $\color{#D61F06}{123} × 8+ 3$ has $3$ digits, so the answer $987$ also has $3$ digits and in descreasing order of numbers. So, $\color{#D61F06}{987654321} × 8 + 9$ has $9$ digits, so the answer would also have $9$ digits in decreasing order = $\color{#69047E}{\boxed{987654321}}$ .