We look at the division of 15215269 by 256 
We're looking to find how many times 256 goes into 15215269.

On to step 1:
The number 256 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 256

On to step 2:
15 divided by 256 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 256

Advancing to step 3:
256 goes into 152 0 times with a remainder of 152.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 152 after subtracting 0 from 152.
Fetch the next digit (1) from the dividend, attach it to 152 and continue: 1521 / 256

Moving on to step 4:
256 can be fit into 1521 5 times, resulting in a remainder of 241.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 1280 from 1521 leaves us with 241.
Include the next digit (5) from the dividend after 241, then repeat: 2415 / 256

Going ahead to step 5:
2415 divided by 256 is 9 with a remainder of 111.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Deduct 2304 from 2415 and we're left with 111.
Include the next digit (2) from the dividend after 111, then repeat: 1112 / 256

On to step 6:
When dividing 1112 by 256, we get 4 with a remainder of 88.
The next digit of our result is 4. 
Result so far: 594.0
Subtract 1024 from 1112 to get 88.
Append the next digit (6) from the dividend to 88 and continue with: 886 / 256

Let's proceed to step 7:
256 can be fit into 886 3 times, resulting in a remainder of 118.
The next digit of our result is 3. 
Result so far: 5943.0
Deduct 768 from 886 and we're left with 118.
Bring next digit (9) of the dividend behind the 118 and repeat the process: 1189 / 256

Let's proceed to step 8:
256 goes into 1189 4 times with a remainder of 165.
Write down 4 as next digit of the result. 
Result so far: 59434.0
If we take 1024 away from 1189, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Step 9:
When dividing 1650 by 256, we get 6 with a remainder of 114.
Use 6 as the next digit of our solution. 
Result so far: 59434.6
Subtracting 1536 from 1650 leaves us with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Let's proceed to step 10:
1140 divided by 256 is 4 with a remainder of 116.
The number 4 becomes the next digit in our result. 
Result so far: 59434.64
Subtract 1024 from 1140 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

On to step 11:
If we divide 1160 by 256, we get 4 and a remainder of 136.
Record the quotient 4 as the next digit in the result. 
Result so far: 59434.644
Deduct 1024 from 1160 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

The quotient of the division is 59434.644, and the remainder is 0.0136.