Shortcut for Multiplication of 3 digit numbers

A  B  C
D  E  F

Step 1: C × F

Step 2: (B × F) + (C ×E)   + Carry Part

Step 3: (A × F) + (C × D) + (B × E)    + Carry Part

Step 4: (A × E) + (B × D)      + Carry Part

Step 5: A × D     + Carry Part

   7  8  9
x 1  2  3
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Explanation: