Answer:
21862
Explanation:
it is simple you put 643
.................... * 34
first you multiply 4 times 3 and you get 12 so you put a one above the 4 in 643 and put three under the equation and so aon with all the numbers on top.
then you move on to the 3 in 34 and then you multiply it my all the numbers in 643 and you get the answer of 21862
hope this helped!!