Multiplication trick

To make the multiplication with some trick

12*13=?

Take first digit from each side

1*1=1

Then make cross multiple with other digit and sum the result

(1*3)+(1*2)=5

finally take multiple of last digit in both the side

2*3=6

now con cat all the result will give you the result

1+5+6

Similarly for little bit complex digit

56*98=?

(5*9)=45

(5*8)+(6*9)=94

(6*8)=48

Here while you join the result some time you can find more than one digit as in this case, if so you have to add the highest position of each result with other.

In our case, you have to combine 45 with 95, here 95 is two digit number and not single digit so add 9 it with 45 which result as below 54 now combine remaining one digit 4 with this 54.

544

similarly for last one

544+48=> 54(4+4)8=>5488

so the result is 56*98=5488