We're dividing 315997 by 86 
Let's see how many times 86 fits into 315997.

On to step 1:
When dividing 3 by 86, we get 0 with 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.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 86

Step 2:
31 divided by 86 is 0 with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 86

Going ahead to step 3:
86 goes into 315 3 times with a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 258 from 315 and we're left with 57.
Take the next digit (9) from the dividend and append it to 57, then repeat: 579 / 86

Advancing to step 4:
The number 86 fits into 579 6 times, leaving a remainder of 63.
Use 6 as the next digit of our solution. 
Result so far: 36.0
The remainder is 63 after subtracting 516 from 579.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 86

Going ahead to step 5:
When dividing 639 by 86, we get 7 with a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 367.0
If we subtract 602 from 639, we get 37.
Append the next digit (7) from the dividend to 37 and continue with: 377 / 86

Let's proceed to step 6:
86 can be fit into 377 4 times, resulting in a remainder of 33.
Use 4 as the next digit of our solution. 
Result so far: 3674.0
Deduct 344 from 377 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
When dividing 330 by 86, we get 3 with a remainder of 72.
Record the quotient 3 as the next digit in the result. 
Result so far: 3674.3
Subtract 258 from 330 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 8:
86 goes into 720 8 times with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 3674.38
If we subtract 688 from 720, we 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.

Let's proceed to step 9:
When dividing 320 by 86, we get 3 with a remainder of 62.
Use 3 as the next digit of our solution. 
Result so far: 3674.383
If we take 258 away from 320, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 10:
620 divided by 86 is 7 with a remainder of 18.
Write down 7 as next digit of the result. 
Result so far: 3674.3837
The remainder is 18 after subtracting 602 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 11:
The number 86 fits into 180 2 times, leaving a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 3674.38372
Subtract 172 from 180 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
When dividing 80 by 86, we get 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 3674.38372
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 13:
The number 86 fits into 800 9 times, leaving a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 3674.3837209
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.

Advancing to step 14:
The number 86 fits into 260 3 times, leaving a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 3674.38372093
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.

The final result is 3674.38372093 with a remainder of 2e-09.