We divide 399901 by 81
Our goal is to divide 399901 by 81.

Step 1:
3 divided by 81 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 81

Moving on to step 2:
81 goes into 39 0 times with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Grab the next digit (9) from the dividend, add it to 39, then carry on: 399 / 81

On to step 3:
When dividing 399 by 81, we get 4 with a remainder of 75.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 324 from 399 to get 75.
Append the next digit (9) from the dividend to 75 and continue with: 759 / 81

Going ahead to step 4:
81 goes into 759 9 times with a remainder of 30.
Use 9 as the next digit of our solution. 
Result so far: 49.0
Subtract 729 from 759 to get 30.
Append the next digit (0) from the dividend to 30 and continue with: 300 / 81

Going ahead to step 5:
When dividing 300 by 81, we get 3 with a remainder of 57.
The next digit of our result is 3. 
Result so far: 493.0
If we take 243 away from 300, we end up with 57.
Bring next digit (1) of the dividend behind the 57 and repeat the process: 571 / 81

Let's proceed to step 6:
The number 81 fits into 571 7 times, leaving a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 4937.0
If we take 567 away from 571, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 7:
40 divided by 81 is 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 4937.0
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
The number 81 fits into 400 4 times, leaving a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 4937.04
Subtract 324 from 400 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
When dividing 760 by 81, we get 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 4937.049
Deduct 729 from 760 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 10:
When dividing 310 by 81, we get 3 with a remainder of 67.
Record the quotient 3 as the next digit in the result. 
Result so far: 4937.0493
Subtracting 243 from 310 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 11:
When dividing 670 by 81, we get 8 with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 4937.04938
If we subtract 648 from 670, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
81 goes into 220 2 times with a remainder of 58.
The next digit of our result is 2. 
Result so far: 4937.049382
Subtracting 162 from 220 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 13:
81 goes into 580 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 4937.0493827
Subtracting 567 from 580 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 14:
81 goes into 130 1 times with a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 4937.04938271
Subtract 81 from 130 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

The final result is 4937.04938271 with a remainder of 4.9e-08.