Let's divide 392815 by 39
We're looking to find how many times 39 goes into 392815.

Moving on to step 1:
If we divide 3 by 39, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 39

Moving on to step 2:
39 can be fit into 39 1 times, resulting in a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 39 from 39 and we're left with 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 39

On to step 3:
If we divide 2 by 39, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we take 0 away from 2, we end up with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 39

Step 4:
28 divided by 39 is 0 with a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 100.0
If we take 0 away from 28, we end up with 28.
Include the next digit (1) from the dividend after 28, then repeat: 281 / 39

On to step 5:
281 divided by 39 is 7 with a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 1007.0
If we take 273 away from 281, we end up with 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 39

Advancing to step 6:
39 can be fit into 85 2 times, resulting in a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 10072.0
The remainder is 7 after subtracting 78 from 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
70 divided by 39 is 1 with a remainder of 31.
Record the quotient 1 as the next digit in the result. 
Result so far: 10072.1
If we subtract 39 from 70, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 8:
39 goes into 310 7 times with a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 10072.17
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 9:
The number 39 fits into 370 9 times, leaving a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 10072.179
If we take 351 away from 370, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 10:
190 divided by 39 is 4 with a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 10072.1794
Deduct 156 from 190 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 11:
340 divided by 39 is 8 with a remainder of 28.
Record the quotient 8 as the next digit in the result. 
Result so far: 10072.17948
Deduct 312 from 340 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 12:
The number 39 fits into 280 7 times, leaving a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 10072.179487
Deduct 273 from 280 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 13:
70 divided by 39 is 1 with a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 10072.1794871
If we subtract 39 from 70, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 14:
If we divide 310 by 39, we get 7 and a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 10072.17948717
If we take 273 away from 310, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

The final result is 10072.17948717 with a remainder of 3.7e-08.