Let's divide 309635 by 86
We want to divide 309635 by 86.

Going ahead to step 1:
If we divide 3 by 86, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 86

Step 2:
86 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Fetch the next digit (9) from the dividend, attach it to 30 and continue: 309 / 86

Moving on to step 3:
When dividing 309 by 86, we get 3 with a remainder of 51.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 258 from 309 leaves us with 51.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 86

Let's proceed to step 4:
516 divided by 86 is 6 with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtracting 516 from 516 leaves us with 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 86

On to step 5:
The number 86 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 360.0
If we subtract 0 from 3, we get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 86

Advancing to step 6:
When dividing 35 by 86, we get 0 with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 3600.0
If we subtract 0 from 35, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 7:
The number 86 fits into 350 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 3600.4
If we take 344 away from 350, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
The number 86 fits into 60 0 times, leaving a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 3600.4
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
If we divide 600 by 86, we get 6 and a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 3600.406
Subtract 516 from 600 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 10:
86 goes into 840 9 times with a remainder of 66.
Record the quotient 9 as the next digit in the result. 
Result so far: 3600.4069
Deduct 774 from 840 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 11:
660 divided by 86 is 7 with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 3600.40697
If we subtract 602 from 660, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 12:
86 can be fit into 580 6 times, resulting in a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 3600.406976
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.

Let's proceed to step 13:
86 can be fit into 640 7 times, resulting in a remainder of 38.
The next digit of our result is 7. 
Result so far: 3600.4069767
Deduct 602 from 640 and we're left 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.

Moving on to step 14:
380 divided by 86 is 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 3600.40697674
Deduct 344 from 380 and we're left 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.

The final result is 3600.40697674 with a remainder of 3.6e-08.