Let's divide 20915373 by 21
Our goal is to divide 20915373 by 21.

Advancing to step 1:
21 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 21

On to step 2:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 21

Moving on to step 3:
209 divided by 21 is 9 with a remainder of 20.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 189 from 209 to get 20.
Fetch the next digit (1) from the dividend, attach it to 20 and continue: 201 / 21

Moving on to step 4:
201 divided by 21 is 9 with a remainder of 12.
Put 9 as the next digit of the answer. 
Result so far: 99.0
Deduct 189 from 201 and we're left with 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 21

Advancing to step 5:
When dividing 125 by 21, we get 5 with a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 995.0
Subtracting 105 from 125 leaves us with 20.
Append the next digit (3) from the dividend to 20 and continue with: 203 / 21

Moving on to step 6:
21 can be fit into 203 9 times, resulting in a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 9959.0
The remainder is 14 after subtracting 189 from 203.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 21

Advancing to step 7:
When dividing 147 by 21, we get 7 with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 99597.0
Subtract 147 from 147 to get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 21

Moving on to step 8:
When dividing 3 by 21, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 995970.0
Subtracting 0 from 3 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
30 divided by 21 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 995970.1
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 10:
90 divided by 21 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 995970.14
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 11:
60 divided by 21 is 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 995970.142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 12:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 995970.1428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 13:
When dividing 120 by 21, we get 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 995970.14285
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 14:
150 divided by 21 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 995970.142857
Deduct 147 from 150 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 15:
When dividing 30 by 21, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 995970.1428571
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 16:
90 divided by 21 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 995970.14285714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 995970.14285714 with a remainder of 6e-09.