We look at the division of 3947923 by 865 
Our goal is to divide 3947923 by 865.

On to step 1:
The number 865 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 865

On to step 2:
865 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Fetch the next digit (4) from the dividend, attach it to 39 and continue: 394 / 865

Let's proceed to step 3:
865 can be fit into 394 0 times, resulting in a remainder of 394.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 394 after subtracting 0 from 394.
Take the next digit (7) from the dividend and append it to 394, then repeat: 3947 / 865

Going ahead to step 4:
If we divide 3947 by 865, we get 4 and a remainder of 487.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 3460 from 3947 leaves us with 487.
Take the next digit (9) from the dividend and append it to 487, then repeat: 4879 / 865

Moving on to step 5:
The number 865 fits into 4879 5 times, leaving a remainder of 554.
Write down 5 as next digit of the result. 
Result so far: 45.0
Subtracting 4325 from 4879 leaves us with 554.
Bring next digit (2) of the dividend behind the 554 and repeat the process: 5542 / 865

On to step 6:
The number 865 fits into 5542 6 times, leaving a remainder of 352.
Write down 6 as next digit of the result. 
Result so far: 456.0
Deduct 5190 from 5542 and we're left with 352.
Take the next digit (3) from the dividend and append it to 352, then repeat: 3523 / 865

Step 7:
3523 divided by 865 is 4 with a remainder of 63.
The number 4 becomes the next digit in our result. 
Result so far: 4564.0
If we subtract 3460 from 3523, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 8:
The number 865 fits into 630 0 times, leaving a remainder of 630.
The number 0 becomes the next digit in our result. 
Result so far: 4564.0
Subtract 0 from 630 to get 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Moving on to step 9:
If we divide 6300 by 865, we get 7 and a remainder of 245.
Write down 7 as next digit of the result. 
Result so far: 4564.07
If we subtract 6055 from 6300, we get 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Advancing to step 10:
If we divide 2450 by 865, we get 2 and a remainder of 720.
Use 2 as the next digit of our solution. 
Result so far: 4564.072
Deduct 1730 from 2450 and we're left with 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Advancing to step 11:
865 can be fit into 7200 8 times, resulting in a remainder of 280.
The next digit of our result is 8. 
Result so far: 4564.0728
Deduct 6920 from 7200 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 12:
The number 865 fits into 2800 3 times, leaving a remainder of 205.
Record the quotient 3 as the next digit in the result. 
Result so far: 4564.07283
If we take 2595 away from 2800, we end up with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 13:
If we divide 2050 by 865, we get 2 and a remainder of 320.
The number 2 becomes the next digit in our result. 
Result so far: 4564.072832
If we subtract 1730 from 2050, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 14:
If we divide 3200 by 865, we get 3 and a remainder of 605.
Write down 3 as next digit of the result. 
Result so far: 4564.0728323
The remainder is 605 after subtracting 2595 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Step 15:
865 goes into 6050 6 times with a remainder of 860.
Put 6 as the next digit of the answer. 
Result so far: 4564.07283236
Deduct 5190 from 6050 and we're left with 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8600, and continue the process.

The final result is 4564.07283236 with a remainder of 8.6e-07.