We look at the division of 21505004 by 45 
We want to divide 21505004 by 45.

Let's proceed to step 1:
If we divide 2 by 45, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
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 / 45

Moving on to step 2:
21 divided by 45 is 0 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.
Take the next digit (5) from the dividend and append it to 21, then repeat: 215 / 45

Let's proceed to step 3:
If we divide 215 by 45, we get 4 and a remainder of 35.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 180 from 215 and we're left with 35.
Take the next digit (0) from the dividend and append it to 35, then repeat: 350 / 45

Going ahead to step 4:
The number 45 fits into 350 7 times, leaving a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 47.0
Subtract 315 from 350 to get 35.
Fetch the next digit (5) from the dividend, attach it to 35 and continue: 355 / 45

Step 5:
45 goes into 355 7 times with a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 477.0
If we subtract 315 from 355, we get 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 45

Moving on to step 6:
45 can be fit into 400 8 times, resulting in a remainder of 40.
Use 8 as the next digit of our solution. 
Result so far: 4778.0
Subtract 360 from 400 to get 40.
Include the next digit (0) from the dividend after 40, then repeat: 400 / 45

Let's proceed to step 7:
If we divide 400 by 45, we get 8 and a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 47788.0
If we subtract 360 from 400, we get 40.
Bring next digit (4) of the dividend behind the 40 and repeat the process: 404 / 45

On to step 8:
When dividing 404 by 45, we get 8 with a remainder of 44.
Put 8 as the next digit of the answer. 
Result so far: 477888.0
Subtract 360 from 404 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
440 divided by 45 is 9 with a remainder of 35.
Record the quotient 9 as the next digit in the result. 
Result so far: 477888.9
If we take 405 away from 440, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 10:
If we divide 350 by 45, we get 7 and a remainder of 35.
Use 7 as the next digit of our solution. 
Result so far: 477888.97
Deduct 315 from 350 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 11:
45 can be fit into 350 7 times, resulting in a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 477888.977
Subtracting 315 from 350 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

In conclusion, the division gives 477888.977 with a balance of 0.0035.