abhi7605 wrote this blog titled "Multiply n numbers by 2 digit (moving multiplier) 3 digit X 2 digit"

Multiply n numbers by 2 digit (moving multiplier) 3 digit X 2 digit

Step 1: Multiply unit digit by unit digit

Step 2: multiply unit and tens place diagonally and add

Step 3: multiply tens place and hundreds place diagonally and add

Step 4: multiply extreme left nos.

Example 1:

Step 1: Multiply unit digit by unit digit

1 2 3 X

   3 1

      3

Step 2: multiply unit and tens place diagonally and add

1 2 3 X

   3 1

 ₁1 3

Step 3: multiply tens place and hundreds place diagonally and add

1 2 3 X

3 1

8 ₁1 3

Step 4: multiply extreme left nos.

1 2 3 X

3 1

3 8 ₁1 3

Final answer will be 3813

Example 2:

Step 1: Multiply unit digit by unit digit

513 X

 4 2

    6

Step 2: multiply unit and tens place diagonally and add

51 3 X

  4 2

₁4 6

Step 3: multiply tens place and hundreds place diagonally and add

5 1 3 X

4 2

₁5₁4 6

Step 4: multiply extreme left nos.

5 1 3 X

4 2

21₁5₁4 6

The final answer will be 21546

Example 3:

Step 1: Multiply unit digit by unit digit

432 X

 4 3

    6

Step 2: multiply unit and tens place diagonally and add

432 X

 4 3

₁7 6

Step 3: multiply tens place and hundreds place diagonally and add

432 X

4 3

₂5₁7 6

Step 4: multiply extreme left nos.

432 X

4 3

18₂5₁7 6

The final answer will be 18576