21522 ÷ 99 
Let's see how many times 99 fits into 21522.

On to step 1:
If we divide 2 by 99, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 99

Advancing to step 2:
99 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 99

On to step 3:
99 goes into 215 2 times with a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 198 from 215 and we're left with 17.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 99

Let's proceed to step 4:
If we divide 172 by 99, we get 1 and a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
If we subtract 99 from 172, we get 73.
Bring next digit (2) of the dividend behind the 73 and repeat the process: 732 / 99

On to step 5:
99 can be fit into 732 7 times, resulting in a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 217.0
Deduct 693 from 732 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 6:
When dividing 390 by 99, we get 3 with a remainder of 93.
The number 3 becomes the next digit in our result. 
Result so far: 217.3
If we take 297 away from 390, we end up with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 7:
99 goes into 930 9 times with a remainder of 39.
The next digit of our result is 9. 
Result so far: 217.39
Subtracting 891 from 930 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 8:
390 divided by 99 is 3 with a remainder of 93.
Write down 3 as next digit of the result. 
Result so far: 217.393
If we take 297 away from 390, we end up with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 9:
When dividing 930 by 99, we get 9 with a remainder of 39.
Put 9 as the next digit of the answer. 
Result so far: 217.3939
Deduct 891 from 930 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 10:
When dividing 390 by 99, we get 3 with a remainder of 93.
Use 3 as the next digit of our solution. 
Result so far: 217.39393
The remainder is 93 after subtracting 297 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Step 11:
930 divided by 99 is 9 with a remainder of 39.
Use 9 as the next digit of our solution. 
Result so far: 217.393939
If we take 891 away from 930, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 12:
When dividing 390 by 99, we get 3 with a remainder of 93.
The number 3 becomes the next digit in our result. 
Result so far: 217.3939393
If we subtract 297 from 390, we get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 13:
The number 99 fits into 930 9 times, leaving a remainder of 39.
Write down 9 as next digit of the result. 
Result so far: 217.39393939
Deduct 891 from 930 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final outcome is 217.39393939, with a leftover of 3.9e-08.