We look at the division of 315229 by 86 
Let's see how many times 86 fits into 315229.

Going ahead to step 1:
3 divided by 86 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 86

Going ahead to step 2:
86 goes into 31 0 times with a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 86

Advancing to step 3:
86 can be fit into 315 3 times, resulting in a remainder of 57.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 258 from 315, we get 57.
Include the next digit (2) from the dividend after 57, then repeat: 572 / 86

Step 4:
The number 86 fits into 572 6 times, leaving a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
If we take 516 away from 572, we end up with 56.
Bring next digit (2) of the dividend behind the 56 and repeat the process: 562 / 86

Moving on to step 5:
When dividing 562 by 86, we get 6 with a remainder of 46.
Use 6 as the next digit of our solution. 
Result so far: 366.0
If we subtract 516 from 562, we get 46.
Grab the next digit (9) from the dividend, add it to 46, then carry on: 469 / 86

On to step 6:
469 divided by 86 is 5 with a remainder of 39.
Record the quotient 5 as the next digit in the result. 
Result so far: 3665.0
Deduct 430 from 469 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 7:
86 can be fit into 390 4 times, resulting in a remainder of 46.
The next digit of our result is 4. 
Result so far: 3665.4
The remainder is 46 after subtracting 344 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
86 goes into 460 5 times with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 3665.45
Subtract 430 from 460 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
300 divided by 86 is 3 with a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 3665.453
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.

Let's proceed to step 10:
420 divided by 86 is 4 with a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 3665.4534
If we subtract 344 from 420, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 11:
760 divided by 86 is 8 with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 3665.45348
The remainder is 72 after subtracting 688 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 12:
86 goes into 720 8 times with a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 3665.453488
Subtract 688 from 720 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The quotient of the division is 3665.453488, and the remainder is 3.2e-06.