We're dividing 115921 by 20 
We're looking to find how many times 20 goes into 115921.

Step 1:
20 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 20

Advancing to step 2:
11 divided by 20 is 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 11, we get 11.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 20

Advancing to step 3:
If we divide 115 by 20, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 100 from 115, we get 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 20

Step 4:
The number 20 fits into 159 7 times, leaving a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 57.0
The remainder is 19 after subtracting 140 from 159.
Append the next digit (2) from the dividend to 19 and continue with: 192 / 20

Advancing to step 5:
When dividing 192 by 20, we get 9 with a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 579.0
If we take 180 away from 192, we end up with 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 20

Moving on to step 6:
The number 20 fits into 121 6 times, leaving a remainder of 1.
The next digit of our result is 6. 
Result so far: 5796.0
If we subtract 120 from 121, we get 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 7:
20 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 5796.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 20 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5796.05
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.

Let's proceed to step 9:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5796.05
If we subtract 0 from 0, we 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.

On to step 10:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 5796.05
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.

After the division, we end up with 5796.05 and a remainder of 0.0.