We look at the division of 431248 by 15 
We want to divide 431248 by 15.

Moving on to step 1:
If we divide 4 by 15, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 15

Step 2:
If we divide 43 by 15, we get 2 and a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 30 from 43 and we're left with 13.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 15

Let's proceed to step 3:
If we divide 131 by 15, we get 8 and a remainder of 11.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
If we take 120 away from 131, we end up with 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 15

Moving on to step 4:
If we divide 112 by 15, we get 7 and a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 287.0
Deduct 105 from 112 and we're left with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 15

Moving on to step 5:
15 goes into 74 4 times with a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 2874.0
Deduct 60 from 74 and we're left with 14.
Grab the next digit (8) from the dividend, add it to 14, then carry on: 148 / 15

Going ahead to step 6:
If we divide 148 by 15, we get 9 and a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 28749.0
If we take 135 away from 148, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
130 divided by 15 is 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 28749.8
Deduct 120 from 130 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 28749.86
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
If we divide 100 by 15, we get 6 and a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 28749.866
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 28749.866 with a remaining 0.001.