Let's divide 256440 by 12
Our goal is to divide 256440 by 12.

Moving on to step 1:
If we divide 2 by 12, 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 subtract 0 from 2, we get 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 12

Let's proceed to step 2:
When dividing 25 by 12, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 24 from 25 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 12

Moving on to step 3:
12 goes into 16 1 times with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 21.0
Subtracting 12 from 16 leaves us with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 12

Going ahead to step 4:
12 can be fit into 44 3 times, resulting in a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 213.0
The remainder is 8 after subtracting 36 from 44.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 12

Going ahead to step 5:
The number 12 fits into 84 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 2137.0
Deduct 84 from 84 and we're left with 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 12

Moving on to step 6:
When dividing 0 by 12, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 21370.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 7:
0 divided by 12 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 21370.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 21370.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 21370.0, with a leftover of 0.0.