1389 divided by 81 
We want to figure out the number of times 1389 can be divided by 81.

Step 1:
81 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 81

Advancing to step 2:
The number 81 fits into 13 0 times, leaving a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 81

Moving on to step 3:
When dividing 138 by 81, we get 1 with a remainder of 57.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 81 from 138 leaves us with 57.
Take the next digit (9) from the dividend and append it to 57, then repeat: 579 / 81

Let's proceed to step 4:
If we divide 579 by 81, we get 7 and a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtract 567 from 579 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 5:
120 divided by 81 is 1 with a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 17.1
Subtracting 81 from 120 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 6:
The number 81 fits into 390 4 times, leaving a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 17.14
If we subtract 324 from 390, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 7:
When dividing 660 by 81, we get 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 17.148
If we subtract 648 from 660, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
81 goes into 120 1 times with a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 17.1481
If we subtract 81 from 120, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 9:
When dividing 390 by 81, we get 4 with a remainder of 66.
The next digit of our result is 4. 
Result so far: 17.14814
Subtract 324 from 390 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 10:
81 goes into 660 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 17.148148
The remainder is 12 after subtracting 648 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
The number 81 fits into 120 1 times, leaving a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 17.1481481
Subtract 81 from 120 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 12:
The number 81 fits into 390 4 times, leaving a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 17.14814814
The remainder is 66 after subtracting 324 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

In conclusion, the division gives 17.14814814 with a balance of 6.6e-08.