872742 ÷ 21 
Our goal is to divide 872742 by 21.

Moving on to step 1:
When dividing 8 by 21, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 21

Moving on to step 2:
21 can be fit into 87 4 times, resulting in a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 84 from 87, we get 3.
Append the next digit (2) from the dividend to 3 and continue with: 32 / 21

Going ahead to step 3:
21 goes into 32 1 times with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 41.0
Subtract 21 from 32 to get 11.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 21

On to step 4:
21 can be fit into 117 5 times, resulting in a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 415.0
Subtracting 105 from 117 leaves us with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 21

Let's proceed to step 5:
The number 21 fits into 124 5 times, leaving a remainder of 19.
Use 5 as the next digit of our solution. 
Result so far: 4155.0
Subtract 105 from 124 to get 19.
Grab the next digit (2) from the dividend, add it to 19, then carry on: 192 / 21

Going ahead to step 6:
192 divided by 21 is 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 41559.0
Deduct 189 from 192 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.

Advancing to step 7:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 41559.1
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 8:
90 divided by 21 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 41559.14
Subtracting 84 from 90 leaves us 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 9:
If we divide 60 by 21, we get 2 and a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 41559.142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 10:
21 can be fit into 180 8 times, resulting in a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 41559.1428
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 41559.14285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 12:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 41559.142857
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.

Let's proceed to step 13:
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: 41559.1428571
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
If we divide 90 by 21, we get 4 and a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 41559.14285714
The remainder is 6 after subtracting 84 from 90.
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 41559.14285714 with a remainder of 6e-09.