We look at the division of 21285516 by 504 
We're looking to find how many times 504 goes into 21285516.

Step 1:
The number 504 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 504

Going ahead to step 2:
504 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 504

On to step 3:
The number 504 fits into 212 0 times, leaving a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 212 to get 212.
Include the next digit (8) from the dividend after 212, then repeat: 2128 / 504

Going ahead to step 4:
504 goes into 2128 4 times with a remainder of 112.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 2016 from 2128, we get 112.
Fetch the next digit (5) from the dividend, attach it to 112 and continue: 1125 / 504

On to step 5:
If we divide 1125 by 504, we get 2 and a remainder of 117.
The next digit of our result is 2. 
Result so far: 42.0
If we take 1008 away from 1125, we end up with 117.
Include the next digit (5) from the dividend after 117, then repeat: 1175 / 504

Step 6:
The number 504 fits into 1175 2 times, leaving a remainder of 167.
Put 2 as the next digit of the answer. 
Result so far: 422.0
If we take 1008 away from 1175, we end up with 167.
Grab the next digit (1) from the dividend, add it to 167, then carry on: 1671 / 504

Let's proceed to step 7:
When dividing 1671 by 504, we get 3 with a remainder of 159.
The next digit of our result is 3. 
Result so far: 4223.0
The remainder is 159 after subtracting 1512 from 1671.
Append the next digit (6) from the dividend to 159 and continue with: 1596 / 504

Step 8:
The number 504 fits into 1596 3 times, leaving a remainder of 84.
Write down 3 as next digit of the result. 
Result so far: 42233.0
If we take 1512 away from 1596, 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.

Moving on to step 9:
The number 504 fits into 840 1 times, leaving a remainder of 336.
Write down 1 as next digit of the result. 
Result so far: 42233.1
The remainder is 336 after subtracting 504 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Advancing to step 10:
504 can be fit into 3360 6 times, resulting in a remainder of 336.
Record the quotient 6 as the next digit in the result. 
Result so far: 42233.16
Subtracting 3024 from 3360 leaves us with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Going ahead to step 11:
3360 divided by 504 is 6 with a remainder of 336.
The next digit of our result is 6. 
Result so far: 42233.166
Subtract 3024 from 3360 to get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

In conclusion, the division gives 42233.166 with a balance of 0.0336.