We look at the division of 21899031 by 900 
Let's see how many times 900 fits into 21899031.

Advancing to step 1:
900 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 900

On to step 2:
900 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Fetch the next digit (8) from the dividend, attach it to 21 and continue: 218 / 900

Advancing to step 3:
When dividing 218 by 900, we get 0 with a remainder of 218.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 218 to get 218.
Take the next digit (9) from the dividend and append it to 218, then repeat: 2189 / 900

Let's proceed to step 4:
2189 divided by 900 is 2 with a remainder of 389.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 389 after subtracting 1800 from 2189.
Include the next digit (9) from the dividend after 389, then repeat: 3899 / 900

Step 5:
3899 divided by 900 is 4 with a remainder of 299.
Write down 4 as next digit of the result. 
Result so far: 24.0
If we take 3600 away from 3899, we end up with 299.
Grab the next digit (0) from the dividend, add it to 299, then carry on: 2990 / 900

Going ahead to step 6:
2990 divided by 900 is 3 with a remainder of 290.
Use 3 as the next digit of our solution. 
Result so far: 243.0
Subtracting 2700 from 2990 leaves us with 290.
Grab the next digit (3) from the dividend, add it to 290, then carry on: 2903 / 900

Let's proceed to step 7:
2903 divided by 900 is 3 with a remainder of 203.
Write down 3 as next digit of the result. 
Result so far: 2433.0
The remainder is 203 after subtracting 2700 from 2903.
Include the next digit (1) from the dividend after 203, then repeat: 2031 / 900

Moving on to step 8:
The number 900 fits into 2031 2 times, leaving a remainder of 231.
Write down 2 as next digit of the result. 
Result so far: 24332.0
Subtracting 1800 from 2031 leaves us with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Let's proceed to step 9:
The number 900 fits into 2310 2 times, leaving a remainder of 510.
The next digit of our result is 2. 
Result so far: 24332.2
Subtract 1800 from 2310 to get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Moving on to step 10:
If we divide 5100 by 900, we get 5 and a remainder of 600.
Record the quotient 5 as the next digit in the result. 
Result so far: 24332.25
Subtracting 4500 from 5100 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 11:
900 can be fit into 6000 6 times, resulting in a remainder of 600.
Write down 6 as next digit of the result. 
Result so far: 24332.256
Subtracting 5400 from 6000 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 12:
When dividing 6000 by 900, we get 6 with a remainder of 600.
Record the quotient 6 as the next digit in the result. 
Result so far: 24332.2566
If we subtract 5400 from 6000, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Our division results in 24332.2566 with a remaining 0.006.