Question

What is easy way to multiply 3 and 4 digit?

Answer 1

For 3 digit number :-
Example:
Three-digit number multiplied by a one-digit number (no carrying):
123 x 3 = ?
(1) 3 x 3 = 9 (the ones)
(2) 2 x 3 = 6 (the tens)
(3) 1 x 3 = 3 (the hundreds)
Answer: 123 x 3 = 369 

Example:
Three-digit number multiplied by a two-digit number (no carrying):
424 x 12 = ?
Part I (424 x 2):
(1) 4 x 2 = 8
(2) 2 x 2 = 4
(3) 4 x 2 = 8
Answer: 424 x 2 = 848 

Example:
Three-digit number multiplied by a three-digit number (no carrying):
213 x 332 = ?
Part I (213 x 2):
(1) 2 x 2 = 4
(2) 1 x 2 = 2
(3) 3 x 2 = 6
Answer: 213 x 2 = 426 

Part II (213 x 3): 
(1) 2 x 3 = 6
(2) 1 x 3 = 3
(3) 3 x 3 = 9
Answer: 213 x 1 = 639 

Part III (213 x 3): 
(1) 2 x 3 = 6
(2) 1 x 3 = 3
(3) 3 x 3 = 9
Answer: 213 x 1 = 639 

Part IV (426 + 6390 + 63900 [we added the zeros]): 
426 + 6390 + 63900 = 70,716 

When written at one time...
213
x 332
426
6390
+ 63900
70716
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I don't know the easy way for 4 digit number... And hope the answer be useful to u...then Pleade mark my answer as Brainliest...
Please! Please!! Please!!!