We look at the division of 123502 by 86 
We want to divide 123502 by 86.

On to step 1:
If we divide 1 by 86, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 86

Let's proceed to step 2:
86 goes into 12 0 times with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Bring next digit (3) of the dividend behind the 12 and repeat the process: 123 / 86

Moving on to step 3:
If we divide 123 by 86, we get 1 and a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 86 from 123, we get 37.
Grab the next digit (5) from the dividend, add it to 37, then carry on: 375 / 86

Step 4:
86 goes into 375 4 times with a remainder of 31.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we subtract 344 from 375, we get 31.
Append the next digit (0) from the dividend to 31 and continue with: 310 / 86

Step 5:
The number 86 fits into 310 3 times, leaving a remainder of 52.
Record the quotient 3 as the next digit in the result. 
Result so far: 143.0
If we subtract 258 from 310, we get 52.
Append the next digit (2) from the dividend to 52 and continue with: 522 / 86

Going ahead to step 6:
The number 86 fits into 522 6 times, leaving a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 1436.0
Subtract 516 from 522 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
86 goes into 60 0 times with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 1436.0
Subtracting 0 from 60 leaves us with 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 8:
600 divided by 86 is 6 with a remainder of 84.
Record the quotient 6 as the next digit in the result. 
Result so far: 1436.06
If we take 516 away from 600, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 9:
If we divide 840 by 86, we get 9 and a remainder of 66.
Write down 9 as next digit of the result. 
Result so far: 1436.069
Subtracting 774 from 840 leaves us 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.

Moving on to step 10:
660 divided by 86 is 7 with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 1436.0697
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.

Going ahead to step 11:
When dividing 580 by 86, we get 6 with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 1436.06976
Deduct 516 from 580 and we're left with 64.
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 12:
86 goes into 640 7 times with a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 1436.069767
The remainder is 38 after subtracting 602 from 640.
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 13:
If we divide 380 by 86, we get 4 and a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 1436.0697674
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.

Step 14:
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: 1436.06976744
If we subtract 344 from 360, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 1436.06976744 with a remainder of 1.6e-08.