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ABCD×DCBA5CCBAAD\large\begin{array}{llllllll}&&&&A&B&C&D\\\times&&&&D&C&B&A\\\hline&5&C&C&B&A&A&D\end{array}×5CCADBBCACBADAD
What is the value of DCBA‾−ABCD‾\overline{DCBA}-\overline{ABCD}DCBA−ABCD?
Clarification: A,B,CA,B,CA,B,C and DDD are distinct single digits with AAA and DDD non-zero.
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