We look at the division of 81420 by 12 
We want to figure out the number of times 81420 can be divided by 12.

Step 1:
12 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 12

Going ahead to step 2:
12 goes into 81 6 times with a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 9 after subtracting 72 from 81.
Append the next digit (4) from the dividend to 9 and continue with: 94 / 12

Going ahead to step 3:
12 goes into 94 7 times with a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 67.0
Deduct 84 from 94 and we're left with 10.
Append the next digit (2) from the dividend to 10 and continue with: 102 / 12

Advancing to step 4:
12 can be fit into 102 8 times, resulting in a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 678.0
The remainder is 6 after subtracting 96 from 102.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 12

Moving on to step 5:
When dividing 60 by 12, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6785.0
If we take 60 away from 60, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 6:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6785.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
12 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6785.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 6785.0 with a remaining 0.0.