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Work out the following multiplication.
image
Use the result to answer the following questions. (a) What will be 12345679 `xx` 45? (b) What will be 12345679 `xx` 63? (c) By what number should 12345679 be multiplied to get 888888888? (d) By what number should 12345679 be multiplied to get 999999999?

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