863091 divided by 39 
We're looking to find how many times 39 goes into 863091.

On to step 1:
The number 39 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 39

Going ahead to step 2:
39 can be fit into 86 2 times, resulting in a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 78 away from 86, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 39

On to step 3:
83 divided by 39 is 2 with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Deduct 78 from 83 and we're left with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 39

Going ahead to step 4:
If we divide 50 by 39, we get 1 and a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 221.0
If we subtract 39 from 50, we get 11.
Take the next digit (9) from the dividend and append it to 11, then repeat: 119 / 39

Moving on to step 5:
If we divide 119 by 39, we get 3 and a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 2213.0
If we subtract 117 from 119, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 39

Step 6:
21 divided by 39 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 22130.0
Subtracting 0 from 21 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 7:
39 goes into 210 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 22130.5
If we take 195 away from 210, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 8:
150 divided by 39 is 3 with a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 22130.53
If we take 117 away from 150, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 9:
When dividing 330 by 39, we get 8 with a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 22130.538
If we take 312 away from 330, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 10:
The number 39 fits into 180 4 times, leaving a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 22130.5384
If we subtract 156 from 180, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
The number 39 fits into 240 6 times, leaving a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 22130.53846
If we subtract 234 from 240, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 12:
60 divided by 39 is 1 with a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 22130.538461
If we subtract 39 from 60, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 13:
39 can be fit into 210 5 times, resulting in a remainder of 15.
The next digit of our result is 5. 
Result so far: 22130.5384615
Subtract 195 from 210 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 14:
If we divide 150 by 39, we get 3 and a remainder of 33.
Use 3 as the next digit of our solution. 
Result so far: 22130.53846153
Deduct 117 from 150 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

The final outcome is 22130.53846153, with a leftover of 3.3e-08.