We look at the division of 86103 by 15 
Our goal is to divide 86103 by 15.

Advancing to step 1:
8 divided by 15 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 15

Moving on to step 2:
15 can be fit into 86 5 times, resulting in a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 11 after subtracting 75 from 86.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 15

On to step 3:
If we divide 111 by 15, we get 7 and a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 57.0
Subtracting 105 from 111 leaves us with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 15

Advancing to step 4:
When dividing 60 by 15, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 574.0
Subtract 60 from 60 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 15

Going ahead to step 5:
When dividing 3 by 15, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 5740.0
If we take 0 away from 3, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 6:
If we divide 30 by 15, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 5740.2
Subtracting 30 from 30 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
If we divide 0 by 15, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5740.2
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 5740.2
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 5740.2 with a remaining 0.0.