Let's divide 20621 by 1
Let's see how many times 1 fits into 20621.

Moving on to step 1:
1 can be fit into 2 2 times, resulting in a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 0 after subtracting 2 from 2.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 1

Going ahead to step 2:
The number 1 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtract 0 from 0 to get 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 1

On to step 3:
The number 1 fits into 6 6 times, leaving a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 206.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 1

Advancing to step 4:
If we divide 2 by 1, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2062.0
The remainder is 0 after subtracting 2 from 2.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

On to step 5:
If we divide 1 by 1, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 20621.0
Subtracting 1 from 1 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 6:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20621.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20621.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 20621.0 with a remainder of 0.0.