Let's divide 390500 by 81
We're looking to find how many times 81 goes into 390500.

Going ahead to step 1:
If we divide 3 by 81, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 81

Step 2:
81 can be fit into 39 0 times, resulting in 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.
Include the next digit (0) from the dividend after 39, then repeat: 390 / 81

Advancing to step 3:
81 goes into 390 4 times with a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 324 from 390 and we're left with 66.
Bring next digit (5) of the dividend behind the 66 and repeat the process: 665 / 81

Moving on to step 4:
81 can be fit into 665 8 times, resulting in a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 48.0
Deduct 648 from 665 and we're left with 17.
Fetch the next digit (0) from the dividend, attach it to 17 and continue: 170 / 81

Step 5:
81 goes into 170 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 482.0
Subtract 162 from 170 to get 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 81

Moving on to step 6:
When dividing 80 by 81, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 4820.0
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 7:
If we divide 800 by 81, we get 9 and a remainder of 71.
Record the quotient 9 as the next digit in the result. 
Result so far: 4820.9
The remainder is 71 after subtracting 729 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 8:
81 can be fit into 710 8 times, resulting in a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 4820.98
Deduct 648 from 710 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 9:
If we divide 620 by 81, we get 7 and a remainder of 53.
The number 7 becomes the next digit in our result. 
Result so far: 4820.987
Subtract 567 from 620 to get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 10:
If we divide 530 by 81, we get 6 and a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 4820.9876
If we take 486 away from 530, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 11:
If we divide 440 by 81, we get 5 and a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 4820.98765
Subtract 405 from 440 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 12:
350 divided by 81 is 4 with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 4820.987654
If we subtract 324 from 350, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 13:
If we divide 260 by 81, we get 3 and a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 4820.9876543
The remainder is 17 after subtracting 243 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 14:
If we divide 170 by 81, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 4820.98765432
Subtract 162 from 170 to 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.

After the division, we end up with 4820.98765432 and a remainder of 8e-09.