We're dividing 863945 by 86 
We're looking to find how many times 86 goes into 863945.

On to step 1:
When dividing 8 by 86, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 86

Step 2:
When dividing 86 by 86, we get 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 0 after subtracting 86 from 86.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 86

Moving on to step 3:
When dividing 3 by 86, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 10.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 86

Let's proceed to step 4:
If we divide 39 by 86, we get 0 and a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we subtract 0 from 39, we get 39.
Append the next digit (4) from the dividend to 39 and continue with: 394 / 86

Advancing to step 5:
The number 86 fits into 394 4 times, leaving a remainder of 50.
Record the quotient 4 as the next digit in the result. 
Result so far: 1004.0
If we take 344 away from 394, we end up with 50.
Grab the next digit (5) from the dividend, add it to 50, then carry on: 505 / 86

Going ahead to step 6:
When dividing 505 by 86, we get 5 with a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 10045.0
Subtracting 430 from 505 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 7:
86 can be fit into 750 8 times, resulting in a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 10045.8
Subtract 688 from 750 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 8:
620 divided by 86 is 7 with a remainder of 18.
The next digit of our result is 7. 
Result so far: 10045.87
Subtracting 602 from 620 leaves us 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.

On to step 9:
When dividing 180 by 86, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 10045.872
The remainder is 8 after subtracting 172 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
When dividing 80 by 86, we get 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 10045.872
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 11:
86 can be fit into 800 9 times, resulting in a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 10045.87209
Deduct 774 from 800 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 12:
The number 86 fits into 260 3 times, leaving a remainder of 2.
The next digit of our result is 3. 
Result so far: 10045.872093
The remainder is 2 after subtracting 258 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 13:
86 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 10045.872093
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
When dividing 200 by 86, we get 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 10045.87209302
Subtract 172 from 200 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final result is 10045.87209302 with a remainder of 2.8e-08.