Let's divide 399005 by 86
We're looking to find how many times 86 goes into 399005.

Step 1:
The number 86 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 86

On to step 2:
86 can be fit into 39 0 times, resulting in a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 86

Going ahead to step 3:
If we divide 399 by 86, we get 4 and a remainder of 55.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 344 away from 399, we end up with 55.
Take the next digit (0) from the dividend and append it to 55, then repeat: 550 / 86

Step 4:
86 goes into 550 6 times with a remainder of 34.
The next digit of our result is 6. 
Result so far: 46.0
Deduct 516 from 550 and we're left with 34.
Fetch the next digit (0) from the dividend, attach it to 34 and continue: 340 / 86

Step 5:
86 goes into 340 3 times with a remainder of 82.
Write down 3 as next digit of the result. 
Result so far: 463.0
If we subtract 258 from 340, we get 82.
Take the next digit (5) from the dividend and append it to 82, then repeat: 825 / 86

Step 6:
825 divided by 86 is 9 with a remainder of 51.
The number 9 becomes the next digit in our result. 
Result so far: 4639.0
Subtracting 774 from 825 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 7:
86 goes into 510 5 times with a remainder of 80.
The next digit of our result is 5. 
Result so far: 4639.5
Subtracting 430 from 510 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.

On to step 8:
800 divided by 86 is 9 with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 4639.59
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.

Going ahead to step 9:
When dividing 260 by 86, we get 3 with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 4639.593
Subtract 258 from 260 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 10:
86 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 4639.593
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 11:
When dividing 200 by 86, we get 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 4639.59302
The remainder is 28 after subtracting 172 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
If we divide 280 by 86, we get 3 and a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 4639.593023
The remainder is 22 after subtracting 258 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 13:
When dividing 220 by 86, we get 2 with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 4639.5930232
Subtracting 172 from 220 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 14:
86 can be fit into 480 5 times, resulting in a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 4639.59302325
Subtract 430 from 480 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 4639.59302325 with a remainder of 5e-08.