Let's divide 548088 by 21
We're looking to find how many times 21 goes into 548088.

Advancing to step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 21

On to step 2:
21 goes into 54 2 times with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 42 away from 54, we end up with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 21

Let's proceed to step 3:
When dividing 128 by 21, we get 6 with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Deduct 126 from 128 and we're left with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 21

Going ahead to step 4:
20 divided by 21 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 260.0
The remainder is 20 after subtracting 0 from 20.
Include the next digit (8) from the dividend after 20, then repeat: 208 / 21

On to step 5:
21 can be fit into 208 9 times, resulting in a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 2609.0
Subtract 189 from 208 to get 19.
Append the next digit (8) from the dividend to 19 and continue with: 198 / 21

Moving on to step 6:
When dividing 198 by 21, we get 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 26099.0
Subtract 189 from 198 to 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.

Moving on to step 7:
90 divided by 21 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 26099.4
Subtract 84 from 90 to 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.

On to step 8:
The number 21 fits into 60 2 times, leaving a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 26099.42
If we take 42 away from 60, we end up 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.

Moving on to step 9:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 26099.428
Deduct 168 from 180 and we're left 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.

On to step 10:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 26099.4285
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.

Advancing to step 11:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The next digit of our result is 7. 
Result so far: 26099.42857
If we subtract 147 from 150, we get 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 12:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 26099.428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
When dividing 90 by 21, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 26099.4285714
If we take 84 away from 90, we end up 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.

Let's proceed to step 14:
21 goes into 60 2 times with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 26099.42857142
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.

Our division results in 26099.42857142 with a remaining 1.8e-08.