21961 ÷ 20 
Our goal is to divide 21961 by 20.

Going ahead to step 1:
If we divide 2 by 20, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
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 / 20

Advancing to step 2:
21 divided by 20 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 1 after subtracting 20 from 21.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 20

Advancing to step 3:
The number 20 fits into 19 0 times, leaving a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 19 to get 19.
Bring next digit (6) of the dividend behind the 19 and repeat the process: 196 / 20

Going ahead to step 4:
The number 20 fits into 196 9 times, leaving a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 109.0
Subtract 180 from 196 to get 16.
Fetch the next digit (1) from the dividend, attach it to 16 and continue: 161 / 20

On to step 5:
The number 20 fits into 161 8 times, leaving a remainder of 1.
The next digit of our result is 8. 
Result so far: 1098.0
The remainder is 1 after subtracting 160 from 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 6:
20 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 1098.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
20 goes into 100 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1098.05
Deduct 100 from 100 and we're left 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.

On to step 8:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1098.05
Deduct 0 from 0 and we're left 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.

Advancing to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1098.05
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.

In conclusion, the division gives 1098.05 with a balance of 0.0.