541172 ÷ 21 
Our goal is to divide 541172 by 21.

On to step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 21

Let's proceed to step 2:
21 can be fit into 54 2 times, resulting in a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 42 from 54 leaves us with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 21

Moving on to step 3:
If we divide 121 by 21, we get 5 and a remainder of 16.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we subtract 105 from 121, we get 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 21

Let's proceed to step 4:
The number 21 fits into 161 7 times, leaving a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 257.0
Subtract 147 from 161 to get 14.
Include the next digit (7) from the dividend after 14, then repeat: 147 / 21

Going ahead to step 5:
147 divided by 21 is 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 2577.0
The remainder is 0 after subtracting 147 from 147.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 21

Moving on to step 6:
2 divided by 21 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 25770.0
Deduct 0 from 2 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
21 goes into 20 0 times with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 25770.0
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
When dividing 200 by 21, we get 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 25770.09
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
If we divide 110 by 21, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 25770.095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 10:
21 goes into 50 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 25770.0952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
When dividing 80 by 21, we get 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 25770.09523
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 12:
If we divide 170 by 21, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 25770.095238
Subtracting 168 from 170 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 13:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 25770.095238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 25770.09523809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

After the division, we end up with 25770.09523809 and a remainder of 1.1e-08.