We look at the division of 648521 by 15 
Our goal is to divide 648521 by 15.

Let's proceed to step 1:
15 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 15

Let's proceed to step 2:
When dividing 64 by 15, we get 4 with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 60 from 64, we get 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 15

Advancing to step 3:
If we divide 48 by 15, we get 3 and a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
If we subtract 45 from 48, we get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 15

Moving on to step 4:
If we divide 35 by 15, we get 2 and a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 432.0
Subtracting 30 from 35 leaves us with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 15

Going ahead to step 5:
The number 15 fits into 52 3 times, leaving a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 4323.0
Deduct 45 from 52 and we're left with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 15

Advancing to step 6:
15 can be fit into 71 4 times, resulting in a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 43234.0
If we subtract 60 from 71, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
110 divided by 15 is 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 43234.7
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 8:
50 divided by 15 is 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 43234.73
Subtracting 45 from 50 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
15 goes into 50 3 times with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 43234.733
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 43234.733 with a remainder of 0.0005.