21230581 ÷ 899 
Let's see how many times 899 fits into 21230581.

Advancing to step 1:
2 divided by 899 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 899

Let's proceed to step 2:
899 can be fit into 21 0 times, resulting in 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.
Take the next digit (2) from the dividend and append it to 21, then repeat: 212 / 899

Going ahead to step 3:
The number 899 fits into 212 0 times, leaving a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 212 leaves us with 212.
Include the next digit (3) from the dividend after 212, then repeat: 2123 / 899

Going ahead to step 4:
The number 899 fits into 2123 2 times, leaving a remainder of 325.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 325 after subtracting 1798 from 2123.
Take the next digit (0) from the dividend and append it to 325, then repeat: 3250 / 899

Let's proceed to step 5:
899 can be fit into 3250 3 times, resulting in a remainder of 553.
The next digit of our result is 3. 
Result so far: 23.0
If we subtract 2697 from 3250, we get 553.
Bring next digit (5) of the dividend behind the 553 and repeat the process: 5535 / 899

Moving on to step 6:
5535 divided by 899 is 6 with a remainder of 141.
The number 6 becomes the next digit in our result. 
Result so far: 236.0
If we subtract 5394 from 5535, we get 141.
Include the next digit (8) from the dividend after 141, then repeat: 1418 / 899

Let's proceed to step 7:
1418 divided by 899 is 1 with a remainder of 519.
Write down 1 as next digit of the result. 
Result so far: 2361.0
If we take 899 away from 1418, we end up with 519.
Grab the next digit (1) from the dividend, add it to 519, then carry on: 5191 / 899

Let's proceed to step 8:
899 can be fit into 5191 5 times, resulting in a remainder of 696.
Use 5 as the next digit of our solution. 
Result so far: 23615.0
Subtracting 4495 from 5191 leaves us with 696.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6960, and continue the process.

On to step 9:
When dividing 6960 by 899, we get 7 with a remainder of 667.
Record the quotient 7 as the next digit in the result. 
Result so far: 23615.7
If we take 6293 away from 6960, we end up with 667.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6670, and continue the process.

Going ahead to step 10:
899 goes into 6670 7 times with a remainder of 377.
Put 7 as the next digit of the answer. 
Result so far: 23615.77
If we subtract 6293 from 6670, we get 377.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

After the division, we end up with 23615.77 and a remainder of 0.377.