abhi7605 wrote this blog titled "Multiply n numbers by 2 digit (moving multiplier) 4 digit X 2 digit"

Multiply n numbers by 2 digit (moving multiplier) 4 digit X 2 digit

Step 1: Multiply unit digit by unit digit

Step 2: multiply unit and tens place diagonally and add

Note :(move multiplier 1 step to left)

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

Step 4: multiply hundreds place and thousands place diagonally and

Step 5: multiply extreme left nos.

Example 1:

Step 1: Multiply unit digit by unit digit

6213 X

   42

      6

Step 2: multiply unit and tens place diagonally and add

6213 X

   42

   ₁4 6

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

6213 X

  42

  9 ₁4 6

Step 4: multiply tens place and hundreds place diagonally and add

6213 X

42

₂0 9 ₁4 6

Step 5: multiply extreme left nos.

6213 X

42

26 ₂0 9 ₁4 6

Final answer will be 260946

Example 2:

Step 1: Multiply unit digit by unit digit

5214 X

    62

      8

Step 2: multiply unit and tens place diagonally and add

5214 X

    62

  ₂6 8

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

5214 X

    62

₁2  ₂6 8

Step 4: multiply tens place and hundreds place diagonally and add

5214 X

    62

₂3 ₁2  ₂6 8

Step 5: multiply extreme left nos.

5214 X

    62

32₂3 ₁2 ₂6 8

The final answer will be 323268

Example 3:

Step 1: Multiply unit digit by unit digit

5321 X

   22

    2

Step 2: multiply unit and tens place diagonally and add

5321 X

   22

  6 2

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

5321 X

   22

₁0  6 2

Step 4: multiply tens place and hundreds place diagonally and add

5321 X

   22

₁7₁0  6 2

Step 5: multiply extreme left nos.

5321 X

   22

11₁7₁0  6 2

The final answer will be 117062