Any two digit multiplication problem? 43×85=3655 4 × 3 × 8 5 4 4 + 32 15 36 55 How is the last 36 55 calculated

This is India's two digit multiplication method
43 * 85 as an example, first 4 * 8 3 * 5
Get a four digit 3215
Then 4 * 5 + 8 * 3 = 44
Add this 44 to the top 100 to get 3655

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