21273339 ÷ 220 
Our goal is to divide 21273339 by 220.

Advancing to step 1:
When dividing 2 by 220, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 220

On to step 2:
21 divided by 220 is 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (2) from the dividend and append it to 21, then repeat: 212 / 220

Let's proceed to step 3:
212 divided by 220 is 0 with a remainder of 212.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 212 and we're left with 212.
Bring next digit (7) of the dividend behind the 212 and repeat the process: 2127 / 220

Going ahead to step 4:
220 can be fit into 2127 9 times, resulting in a remainder of 147.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 1980 from 2127, we get 147.
Grab the next digit (3) from the dividend, add it to 147, then carry on: 1473 / 220

Let's proceed to step 5:
The number 220 fits into 1473 6 times, leaving a remainder of 153.
Write down 6 as next digit of the result. 
Result so far: 96.0
Subtracting 1320 from 1473 leaves us with 153.
Include the next digit (3) from the dividend after 153, then repeat: 1533 / 220

Moving on to step 6:
220 goes into 1533 6 times with a remainder of 213.
The next digit of our result is 6. 
Result so far: 966.0
If we subtract 1320 from 1533, we get 213.
Include the next digit (3) from the dividend after 213, then repeat: 2133 / 220

On to step 7:
220 goes into 2133 9 times with a remainder of 153.
The next digit of our result is 9. 
Result so far: 9669.0
If we subtract 1980 from 2133, we get 153.
Take the next digit (9) from the dividend and append it to 153, then repeat: 1539 / 220

Step 8:
The number 220 fits into 1539 6 times, leaving a remainder of 219.
Put 6 as the next digit of the answer. 
Result so far: 96696.0
If we subtract 1320 from 1539, we get 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Step 9:
When dividing 2190 by 220, we get 9 with a remainder of 210.
Write down 9 as next digit of the result. 
Result so far: 96696.9
Subtracting 1980 from 2190 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Step 10:
The number 220 fits into 2100 9 times, leaving a remainder of 120.
Write down 9 as next digit of the result. 
Result so far: 96696.99
If we take 1980 away from 2100, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 96696.99 and a remainder of 0.12.