We divide 393928 by 81
We're looking to find how many times 81 goes into 393928.

Advancing to 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

Advancing to step 2:
39 divided by 81 is 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Append the next digit (3) from the dividend to 39 and continue with: 393 / 81

Advancing to step 3:
The number 81 fits into 393 4 times, leaving a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 324 from 393 leaves us with 69.
Bring next digit (9) of the dividend behind the 69 and repeat the process: 699 / 81

On to step 4:
81 can be fit into 699 8 times, resulting in a remainder of 51.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
Deduct 648 from 699 and we're left with 51.
Include the next digit (2) from the dividend after 51, then repeat: 512 / 81

Going ahead to step 5:
81 goes into 512 6 times with a remainder of 26.
Write down 6 as next digit of the result. 
Result so far: 486.0
If we subtract 486 from 512, we get 26.
Fetch the next digit (8) from the dividend, attach it to 26 and continue: 268 / 81

Going ahead to step 6:
If we divide 268 by 81, we get 3 and a remainder of 25.
Use 3 as the next digit of our solution. 
Result so far: 4863.0
If we take 243 away from 268, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 7:
When dividing 250 by 81, we get 3 with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 4863.3
The remainder is 7 after subtracting 243 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 8:
70 divided by 81 is 0 with a remainder of 70.
The next digit of our result is 0. 
Result so far: 4863.3
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 9:
700 divided by 81 is 8 with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 4863.308
Subtract 648 from 700 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 10:
If we divide 520 by 81, we get 6 and a remainder of 34.
The next digit of our result is 6. 
Result so far: 4863.3086
Subtract 486 from 520 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 11:
81 can be fit into 340 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 4863.30864
Subtract 324 from 340 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
If we divide 160 by 81, we get 1 and a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 4863.308641
Deduct 81 from 160 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 13:
81 can be fit into 790 9 times, resulting in a remainder of 61.
The next digit of our result is 9. 
Result so far: 4863.3086419
Deduct 729 from 790 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 14:
If we divide 610 by 81, we get 7 and a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 4863.30864197
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Our division results in 4863.30864197 with a remaining 4.3e-08.