abhi7605 wrote this blog titled "Multiplication of 3 digit by 3 digit"

Multiplication of 3 digit by 3 digit

step 1 : Multiply unit digit by unit digit

o  o  o

o  o  o

step 2 : Multiply nos. diagonally and add

o  o  o

o  o  o

step 3 : multiply the extreme nos. diagonally and the centre nos. and finally add.

o  o  o

o  o  o

step 4 : Multiply nos. diagonally and add

o  o  o

o  o  o

step 5 : Multiply nos. on extreme left

o  o  o

o  o  o

Example 1:

Step 1 : Multiply unit digit by unit digit

321 X

432

    2

step 2 : Multiply nos. diagonally and add

321 X

432

 7 2

step 3 : multiply the extreme nos. diagonally and the centre nos. and finally add.

321 X

            432

         ₁672 (1 will go as a carry)

step 4 : Multiply nos. diagonally and add

321 X

            432

           ₁8672 (1 will go as a carry)

step 5 : Multiply nos. on extreme left

321 X

            432

     138672

So the final answer will be 138672

Example 2:

Step 1 : Multiply unit digit by unit digit

603 X

105

    ₁5 (1 will go as a carry)

step 2 : Multiply nos. diagonally and add

603 X

105

 15

step 3 : multiply the extreme nos. diagonally and the centre nos. and finally add.

603 X

105

₃315 (3 will go as a carry)

step 4 : Multiply nos. diagonally and add

603 X

105

3315

step 5 : Multiply nos. on extreme left

603 X

105

63315

So the final answer will be 63315

Example 3:

Step 1 : Multiply unit digit by unit digit

642 X

112

    4

step 2 : Multiply nos. diagonally and add

642 X

112

 ₁04 (1 will go as a carry)

step 3 : multiply the extreme nos. diagonally and the centre nos. and finally add.

642 X

112

₁904 (1 will go as a carry)

step 4 : Multiply nos. diagonally and add

642 X

112

₁1904 (1 will go as a carry)

step 5 : Multiply nos. on extreme left

642 X

112

71904

So the final answer will be 71904