309572 divided by 86 
We're looking to find how many times 86 goes into 309572.

On to step 1:
3 divided by 86 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 86

Going ahead to step 2:
86 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 86

On to step 3:
If we divide 309 by 86, we get 3 and a remainder of 51.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 258 from 309 leaves us with 51.
Include the next digit (5) from the dividend after 51, then repeat: 515 / 86

On to step 4:
86 goes into 515 5 times with a remainder of 85.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Subtracting 430 from 515 leaves us with 85.
Bring next digit (7) of the dividend behind the 85 and repeat the process: 857 / 86

Step 5:
The number 86 fits into 857 9 times, leaving a remainder of 83.
Write down 9 as next digit of the result. 
Result so far: 359.0
Deduct 774 from 857 and we're left with 83.
Bring next digit (2) of the dividend behind the 83 and repeat the process: 832 / 86

Let's proceed to step 6:
The number 86 fits into 832 9 times, leaving a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 3599.0
The remainder is 58 after subtracting 774 from 832.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 7:
86 goes into 580 6 times with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 3599.6
The remainder is 64 after subtracting 516 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 8:
86 goes into 640 7 times with a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 3599.67
Subtracting 602 from 640 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 9:
The number 86 fits into 380 4 times, leaving a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 3599.674
Subtracting 344 from 380 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 10:
86 can be fit into 360 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 3599.6744
Subtracting 344 from 360 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

In conclusion, the division gives 3599.6744 with a balance of 0.00016.