We look at the division of 579991 by 86 
Let's see how many times 86 fits into 579991.

Step 1:
When dividing 5 by 86, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 86

Let's proceed to step 2:
If we divide 57 by 86, we get 0 and a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Append the next digit (9) from the dividend to 57 and continue with: 579 / 86

Advancing to step 3:
86 can be fit into 579 6 times, resulting in a remainder of 63.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Deduct 516 from 579 and we're left with 63.
Include the next digit (9) from the dividend after 63, then repeat: 639 / 86

On to step 4:
86 goes into 639 7 times with a remainder of 37.
Record the quotient 7 as the next digit in the result. 
Result so far: 67.0
If we take 602 away from 639, we end up with 37.
Grab the next digit (9) from the dividend, add it to 37, then carry on: 379 / 86

Let's proceed to step 5:
379 divided by 86 is 4 with a remainder of 35.
Use 4 as the next digit of our solution. 
Result so far: 674.0
If we subtract 344 from 379, we get 35.
Include the next digit (1) from the dividend after 35, then repeat: 351 / 86

On to step 6:
351 divided by 86 is 4 with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 6744.0
The remainder is 7 after subtracting 344 from 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
70 divided by 86 is 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 6744.0
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 8:
The number 86 fits into 700 8 times, leaving a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 6744.08
The remainder is 12 after subtracting 688 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 9:
If we divide 120 by 86, we get 1 and a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 6744.081
The remainder is 34 after subtracting 86 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
86 can be fit into 340 3 times, resulting in a remainder of 82.
Put 3 as the next digit of the answer. 
Result so far: 6744.0813
Subtracting 258 from 340 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 11:
86 goes into 820 9 times with a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 6744.08139
If we subtract 774 from 820, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 12:
When dividing 460 by 86, we get 5 with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 6744.081395
The remainder is 30 after subtracting 430 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 13:
The number 86 fits into 300 3 times, leaving a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 6744.0813953
The remainder is 42 after subtracting 258 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 14:
86 can be fit into 420 4 times, resulting in a remainder of 76.
Record the quotient 4 as the next digit in the result. 
Result so far: 6744.08139534
The remainder is 76 after subtracting 344 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The quotient of the division is 6744.08139534, and the remainder is 7.6e-08.