We're dividing 81989738 by 12 
We want to figure out the number of times 81989738 can be divided by 12.

On to step 1:
12 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 12

Let's proceed to step 2:
The number 12 fits into 81 6 times, leaving a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 72 from 81 to get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 12

Going ahead to step 3:
The number 12 fits into 99 8 times, leaving a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Subtracting 96 from 99 leaves us with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 12

Advancing to step 4:
When dividing 38 by 12, we get 3 with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 683.0
Subtracting 36 from 38 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 12

Moving on to step 5:
12 can be fit into 29 2 times, resulting in a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 6832.0
If we take 24 away from 29, we end up with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 12

Advancing to step 6:
When dividing 57 by 12, we get 4 with a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 68324.0
Subtracting 48 from 57 leaves us with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 12

Going ahead to step 7:
If we divide 93 by 12, we get 7 and a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 683247.0
If we subtract 84 from 93, we get 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 12

Step 8:
When dividing 98 by 12, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 6832478.0
Subtracting 96 from 98 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
20 divided by 12 is 1 with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 6832478.1
Deduct 12 from 20 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 10:
The number 12 fits into 80 6 times, leaving a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 6832478.16
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
If we divide 80 by 12, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 6832478.166
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 6832478.166 with a remaining 0.0008.