2008 × 867 + 2009 × 133
= 2008 × 867 + (2008 + 1) × 133
= 2008 × 867 + 2008 × 133 + 1 × 133
= 2008 × (867 + 133) + 133
= 2008 × 1000 + 133
= 2008000 + 133
= 2008133
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