256298 ÷ 21 
We want to figure out the number of times 256298 can be divided by 21.

Going ahead to step 1:
21 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 21

Let's proceed to step 2:
If we divide 25 by 21, we get 1 and a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 21 from 25, we get 4.
Include the next digit (6) from the dividend after 4, then repeat: 46 / 21

Going ahead to step 3:
The number 21 fits into 46 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 4 after subtracting 42 from 46.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 21

Moving on to step 4:
21 goes into 42 2 times with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
The remainder is 0 after subtracting 42 from 42.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 21

Step 5:
If we divide 9 by 21, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 1220.0
Subtract 0 from 9 to get 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 21

Let's proceed to step 6:
If we divide 98 by 21, we get 4 and a remainder of 14.
The next digit of our result is 4. 
Result so far: 12204.0
If we take 84 away from 98, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
21 goes into 140 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 12204.6
The remainder is 14 after subtracting 126 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
If we divide 140 by 21, we get 6 and a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 12204.66
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 12204.66, with a leftover of 0.014.