We divide 256848 by 21
Our goal is to divide 256848 by 21.

On to step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 21

Step 2:
When dividing 25 by 21, we get 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 4 after subtracting 21 from 25.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 21

Let's proceed to step 3:
The number 21 fits into 46 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 42 from 46 to get 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 21

Going ahead to step 4:
If we divide 48 by 21, we get 2 and a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 122.0
If we take 42 away from 48, we end up with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 21

On to step 5:
If we divide 64 by 21, we get 3 and a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 1223.0
If we subtract 63 from 64, we get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 21

On to step 6:
If we divide 18 by 21, we get 0 and a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 12230.0
If we subtract 0 from 18, we 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.

Moving on to step 7:
21 goes into 180 8 times with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 12230.8
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.

Moving on to step 8:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 12230.85
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 9:
If we divide 150 by 21, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 12230.857
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.

Moving on to step 10:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 12230.8571
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.

Step 11:
The number 21 fits into 90 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 12230.85714
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.

Going ahead to step 12:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 12230.857142
If we subtract 42 from 60, we 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 13:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 12230.8571428
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.

Step 14:
When dividing 120 by 21, we get 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 12230.85714285
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.

The quotient of the division is 12230.85714285, and the remainder is 1.5e-08.