Let's divide 21621208 by 3
We want to divide 21621208 by 3.

Let's proceed to step 1:
2 divided by 3 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 3

Advancing to step 2:
If we divide 21 by 3, we get 7 and a remainder of 0.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 21 from 21 and we're left with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 3

Going ahead to step 3:
If we divide 6 by 3, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 72.0
If we subtract 6 from 6, we get 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 3

Advancing to step 4:
3 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 720.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 3

Going ahead to step 5:
3 can be fit into 21 7 times, resulting in a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 7207.0
The remainder is 0 after subtracting 21 from 21.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 3

Moving on to step 6:
When dividing 2 by 3, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 72070.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 3

Let's proceed to step 7:
20 divided by 3 is 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 720706.0
If we subtract 18 from 20, we get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 3

Moving on to step 8:
3 goes into 28 9 times with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 7207069.0
The remainder is 1 after subtracting 27 from 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
3 can be fit into 10 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 7207069.3
Deduct 9 from 10 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 10:
3 can be fit into 10 3 times, resulting in a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 7207069.33
Subtracting 9 from 10 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 7207069.33 with a remainder of 0.001.